11 best under sink water filter system

• ✔TWO-STAGE ADVANCED WATER PURIFIER WITH 0.5 MICRON: The Frizzlife MK99 Water Filtration System include a TWO-STAGE High precise compoud filter, which has a unique technology that removes over 99.99% of contaminants while leaving in all essential minerals. Eliminates LEAD, HEAVY METALS, CHLORINE, CHROMIUM 6, MERCURY, RUST, VOLATILE ORGANIC COMPOUNDS, CARCINOGENS, AND OTHER CONTAMINANTS, SUCH AS TURBIDITY, ORDORS AND BAD TASTES. Enjoy PURE AND HEALTHY WATER From the tap. NO more bottle water!
• ✔FITS BOTH 1/2" AND 3/8" COLD WATER LINE: Super EASY Installation. Come with 3/8" DIRECT CONNECT hoses that fits standard 3/8" feed water valves under US kitchen sinks. The Inline water filter system also come with a 3/8" to 1/2" converter fittings allow the system directly install to the existing both 1/2" and 3/8" cold water line and faucet under your sink. Took less than 3 minutes and NO PLUMBING REQUIRED! New installation video available.
• ✔BEST AUTO SHUT OFF DESIGN: Utilizing quick change twist-in installation design makes it take less than 3 minutes for you to install the system or doing a filter replacement. Provides quick twist connection for easy, tool-free, no mess filter replacement. The filter cap is designed with BUILT-IN shut off valve. You don't even need to shut off the water supply whenever you work on the filter cartridge replacement.
• ✔HIGH FLOW RATE & MULTI-USAGE: Enjoy tap water as pure and healthy as spring fresh water. Tested Full Flow Rate ＞2.0GPM @40 psig. Good for cooking, washing fruits & veggies and cleaning dishes without watermarks.
• ✔MONEY SAVING & 100% SATISFACTION: The under counter water filter system contains a core filter cartridge inside the housing, you will only need to replace the core part of the filter cartridge instead of throwing away the whole plastic part, it will save you much money on replacing the cartridge and will do a lot of helps on the environmental protection. Each cartridge with high capacity can be used for 2 years or 1,600 gallon water, for better filtration, suggest to replace after 6-8 month.

User questions & answers

Question:	Can this filter be used for a commercial ice machine
Answer:	Hello, The filter in the picture is the EPINL30. Thanks,
Question:	Why is it so difficult to find the actual filter replacement for my frizzlife mk99 filter? you would think this would be a no brainer
Answer:	The 5-year expected life of the EPINL30 is based on a maximum usage of 1500 gallons annually. High levels of sediment or iron in the water supply may clog the filter and reduce its life.
Question:	does this work for septic systems
Answer:	The filter housing alone is 10 inches long.
Question:	How frequent I have to change filter
Answer:	I would just use a strong tape. Mine is just on the floor next to it to keep the refrigerator closest to the wall.

Product features

Frizzlife Under Sink Water Filtration System

GREAT MONEY SAVER

Compare to the other brands, FRIZZLIFE MK99 is designed with a filter cartridge inside the plastic container, it will be much more cost effective than you change the whole plastic. You will notice that the other brands of twisted in water filter will cost you at least 50 dollar to change the filter, while MK99 will cost you less than 20 dollar. What a money saver!!!

Everybody knows the water quality is dropping as time goes by, change more often, the better water quality you will get!

MULTI USAGE

The purified water come out from MK99 water filtration system can go to your refrigerator, icemaker, or extra Frizzlife ST3 water filter faucet by using our Frizzlife Ice Maker Installation Kits to finish the multi usage installation.

Combination of both MK99 and MP99 filter system will allow you have both clear water from your tap and filter faucet. The filter faucet will have purified water filtered after both 2 filters. Connection to a fridge will be a great option too, no mire pitchers.

EASY REPLACEMENT CARTRIDGE

MK99 is super easy to install and easy to change the inner filter cartridge. The filter head has a special design of auto water shut off, it means that you don't need to shut off the water supply from your angle valve when you do the filter replacement.

2-Stage Advanced Water Filtration can remove over 99.99% of LEAD, CHLORINE

Sediment filter cartridge with 5 micron precision reduces particle such as sand, silt, and rust from the water.

Block carbon filter cartridge with 0.5 micron precision that reduces 99.99% of LEAD, CHLORINE, ODOR and PARTICLES from the water.

Removes over 99.99% of contaminants while leaving all essential minerals behind.

✔Removes over 58 contaminants commonly found in drinking water, including 99.99% LEAD, heavy metal, sediment, chlorine taste & odor, chemicals, etc...

✔Essential minerals were leaving behind such as Calcium, potassium, sodium, magnesium, phosphorus, chloride,etc...

✔However, these essential minerals are dissolved solids, PPM WILL NOT BE DROPPING IF YOU TEST WITH A TDS METER

ESSENTIAL MINERALS

CALCIUM

POTASSIUM

SODIUM

MAGNESIUM

These minerals are essential to your body, Frizzlife MP99 water filtration system is keeping all those minerals, but removes elements that are harmful to your body.

• 【Compatibility】Suitable for faucets with 1/2" or 3/8" FEMALE NPT thread. In the event of a different connection type, please contact us BEFORE purchase.
• 【Ultra-long service life】When used with municipal water, each filter has a maximum service life of 12 months or 8,000 gallons.[1]
• 【Innovative multistage filtration】The Waterdrop Direct Connect Undersink Water Filtration System uses innovative multistage filtration. And it can effectively reduces chlorine, heavy metals, chemical pollutants, sediment and other large particles.[2] Enjoy healthy and pure water straight from your tap – no need to buy bottled water anymore!
• 【NSF certified filter】Specially selected premium materials are lead-free, which is fully certified by the WQA against NSF 372 standard. Activated carbon block and other advanced filter media ensure efficient and safe filtration. KDF effectively keep filter sanitary.Tested against NSF 42 standards, it effectively reduces chlorine, taste and odor. The BPA-free, lead-free material ensures more reliable use from the inside out.
• 【Easy installation】The system should be connected only to a cold water supply. With innovative push-to-connect fittings, the entire installation process takes less than 3 minutes. The twist-and-lock design ensures that you can replace the filter in 3 seconds. The system includes a 3/8” hose with a direct connection that adapts to standard 3/8’’ feed water valves under US sinks. The 3/8’’–1/2’’ convertor fitting helps you connect the system to both 1/2’’ and 3/8’’ cold water lines and faucets.
• 【Fast flow rate & multiple uses】The fast and stable water supply provides pure and fresh water that tastes like spring water. The tested full flow rate is 0.75 gpm at 60 psi. Developed for household and commercial use, the Undersink Water Filtration System can be installed in your kitchen, bathroom, RV, or office to meet your daily water needs. Ideal for drinking, cooking, skincare, and cleaning.

Product features

Money-saving

On average, you’ll spend 10 dollars per day for the first year. You’ll pay only 5 dollars per day for the filter replacement and your water quality will improve with each passing day. Enjoy pure drinking water for a long time.

Simple installation

The installation process is as user-friendly as it gets. Due to the innovative system design, installation takes only 3 minutes. Replacing the filter also takes only 3 seconds. The push-to-connect fittings make installation easier, saving you time and effort. You won’t need an additional plumbing service.

Stable and fast water flow

The system has a stable water flow and high filtration efficiency. The tested full flow rate is 2.0 gpm at 60 psi. You’ll get filtered water without the wait.

Multiple options

The Waterdrop Undersink Water Filtration System has different options for connecting to your original faucet, a new Waterdrop faucet, or your refrigerator. The combination of all options will allow you to get pure water from your original faucet, dedicated faucet, and your refrigerator dispenser.

The five-stage filtration ensures a great user experience.

The Waterdrop Undersink Water Filtration System can effectively reduce chlorine, sediment, lead, fluoride, taste and odor, rust, arsenic, and other heavy metals. You don’t have to worry about the safety of the filtered water.

The system also retains minerals that are essential to your body, such as potassium, calcium, sodium, and magnesium.

Home use—kitchen

The system filters out contaminants while retaining beneficial elements. It’s ideal for cooking, washing fruits and vegetables, and washing dishes. You can cook with pure filtered water and enjoy safe and delicious meals.

Home use—bathroom

The stable water flow rate ensures that you can use clean water immediately. The system reduce contaminants in tap water that lead to dry skin and nervous system problems. The filtered water is ideal for face washing, skincare, and personal cleansing, as it maintains skin vitality.

Office use—break room

The adequate water supply meets the water needs in your office. The system works without electricity and doesn’t produce waste water. You can directly connect the system to the original faucet, or you can install a Waterdrop Quick Connect Undersink Filtration System with a dedicated faucet.

Outdoor use—RV

The system is ideal for RV using. With the efficient filtration performance, the system delivers tasty purified water to meet with your various outdoor water needs. The specially added KDF ensure the filter hygiene even during non-camping season. The compact design saves much under sink space and brings more room for storage, say farewell to the bulky bottled water. For the ultimate RV water purification experience, please use along with Waterdrop RV Inline Filter.

Can this system reduce TDS?

Please note that this Undersink Water Filtration System cannot reduce TDS. Not for hard water.

TDS stands for total dissolved solids. It is composed of inorganic salts and a small amount of organic matter. This filter cannot lower the TDS value because it reduces harmful substances while retaining minerals such as potassium, calcium, sodium, and magnesium, which are beneficial for your body.

If you need to reduce TDS and filter hard water, the Waterdrop RO System will be an excellent choice. For details, please search ASIN: B07P1XFYJP, B082CZ9XZ9, B082D177MX.

Can the system filter well water?

No. This system is designed for Municipal Tap Water. If using well water as the source, please make sure the feed water has been through a pre-filtration system, otherwise, large particles in well water will clog the filter easily and shorten filter life.

Product description

As America's favorite brand of reverse osmosis systems, and backed by iSpring’s industry-leading customer support, the RCC7AK is unequaled in quality, performance, and durability. The system consists of 6-stage, layered filtration built around precision reverse osmosis (RO) technology that removes over 1000 different kinds of contaminants in order to provide the best home drinking water filtration available. Unlike some other systems, the combination of both GAC and CTO filters in the 2nd and 3rd stages provides extra layers of protection against harmful chemicals than CTO alone. It features a 75 gallon-per-day capacity RO membrane, which is larger than most in its class and provides the capacity to economically handle the drinking water needs of even a large family.



After flowing through the initial 5 stages of the iSpring RCC7 line of Reverse Osmosis filtering products, the RCC7AK model adds another Alkaline Remineralization (AK) stage. This stage is designed to restore the natural alkalinity and mineral balance of the water. The RO process effectively generates pure water but it also removes a few helpful minerals in the process. The red mineral stone portion of the AK filter adds back healthy minerals including not just calcium, but also other beneficial minerals, like magnesium, that other systems don't. The calcite portion of the filter neutralizes the pH of the RO water. And the water tastes better too. Because RO water is so pure, some people may find it tastes unnatural. Many people prefer the more natural taste that comes from the presence of some minerals in the water. Remineralization restores just the right proportion of healthy minerals.

Designed for do-it-yourself installation by most users, the entire system fits nicely under a standard kitchen sink. Installation is straightforward and all parts necessary for installation are included. You are guided by clear, well organized written instructions, instructional videos and access to iSpring’s unparalleled technical support. The system is quiet and low maintenance with no moving parts. Replacement filters are standard sized and sold at factory direct pricing. A lead-free, solid brass faucet with brushed nickel finish is included with the system and is usually mounted on the counter as the primary source of drinking water, but output lines can also be connected to your ice maker, coffee maker, etc. The whole system is backed by a 1-year money-back guarantee, a 1-year manufacturer warranty and iSpring's unique lifetime technical support provided right here in the USA in Alpharetta Georgia. With the iSpring RCC7AK, enjoy crisp-tasting, bottled quality water, every day, right in your home.

• Incoming Water Pressure: 45 PSI - 70 PSI
• Operating water temperature range: 40 – 100 °F
• Maximum TDS: 750 ppm

Install this RO system in a location where it is safe from hot/cold weather and direct sunlight. Avoid hitting, dropping, or dragging the system as this can cause cracks and leaks

• Certified to NSF/ANSI 58, 6-Stage Alkaline Remineralization Layered Filtration: Exclusively designed to restore the natural alkalinity and mineral balance of water; this reliable and ultra-safe Reverse Osmosis (RO) water filtration system converts your water into clean, pure and healthy drinking water by removing up to 99% of over 1, 000 harmful contaminants like chlorine, fluoride, lead (removes up to 98%), arsenic, asbestos, calcium, sodium and more.
• BENEFITS: The iSpring RCC7AK water softener includes an additional sixth stage - an Alkaline Remineralization filter which restores healthy minerals and produces a balanced alkalinity, which gives your water a more natural taste than regular 5 stage RO water filter; the RO membrane removes not only harmful pollutants but also a few helpful minerals. As a result, a standard 5 stage RO system produces slightly acidic water with a pH of 7. 0 or below
• FEATURES: Beautiful European-Style kitchen faucet. Transparent 1st stage housing for easy visual inspection. Three extra long life pre-filters to remove large contaminants and protect RO membrane. Ultra fine (RO) filter to remove contaminants down to 0. 0001 microns; fine GAC filter to provide final polishing to the purified water and (AK) filter to finally restore just the right proportion of healthy minerals and a natural alkaline balance. The end result is great-tasting bottled-water quality
• EASY DO IT YOURSELF INSTALLATION: The water purifier is designed for do-it-yourself installation and all necessary parts for installation are included, backed by clear, well-organized written instructions, instructional videos, and access to iSpring unparalleled technical support. The entire alkaline water filter fits nicely under a standard kitchen sink. For leak-free installation, simply push tubing ½ inch deep into quick-fitting connectors and lock; no threading pipes needed
• 100% SATISFIED CUSTOMERS: RCC7AK from America’s favorite brand of under sink water filter is the No. 1 rated reverse osmosis systems in the USA backed by iSpring extended manufacturer upon registration and lifetime personalized support from GA, USA, combined with premium quality components, this water filter is to deliver endless bottled quality drinking water right in your home for many years to come, eliminating plastic bottles

Product features

Reinforced Transparent 1st Stage Housing

Provides an easy way to visually inspect the sediment filter and view the contaminants being removed from your water. With the transparent housing you will know it is time for a filter change before a problem occurs.

Finest Micron, Layered Protection

The advantage of having both 5-micron GAC & CTO filters is that loose carbon (GAC, KDF) is better at trapping large contaminants, leaving only smaller ones to the CTO carbon block filter. This allows the CTO filter and RO membrane to function at their maximum efficiency and last longer.

Leak-Free System & Online Supporting Videos

Push to connect fittings and color coordinated tubings simplify the installation process and prevent leaking. We know that high percentage of our customers prefer Do-it-yourself installation. We are investing in video production and aftermarket platform to provide our customers the resources needed to have successful installation and maintenance.

Live Phone Support

We offer technical phone. Contact our expert support team for personal assistance in selecting the right system for your water filtration needs. Now, and years from now, we will be right here and ready to help.

Product description

As America's favorite brand of reverse osmosis systems, and backed by iSpring’s industry-leading customer support, the RCC7P-AK is unequaled in quality, performance, and durability. The system consists of 6-stage, layered filtration built around precision reverse osmosis (RO) technology that removes over 1000+ different kinds of contaminants in order to provide the best home drinking water filtration available.



Unlike some other systems, the combination of both GAC and CTO filters in the 2nd and 3rd stages provides greater protection against harmful chemicals than CTO alone. It features a 75 gallon-per-day capacity RO membrane, which is larger than most in its class and provides the capacity to economically handle the drinking water needs of even a large family.



The RCC7P-AK model of the iSpring RCC7 line of products is equipped with a booster pump for situations where inlet/house water pressure is low – below about 40 PSI. Reverse Osmosis requires high pressure to force the impurities out of the water. If the pressure is too low, the process will not be efficient. Adding a booster pump where the inlet water pressure is too low solves this problem by ensuring optimal pressure to the RO membrane at all times. Pure water can be produced more quickly with less water loss. The booster pump operates nearly noiselessly and only when needed. Usually it can barely be heard over normal kitchen activity.



After flowing through the initial 5 stages of the iSpring RCC7 line of Reverse Osmosis filtering products, the RCC7P-AK model also adds another Alkaline Remineralization (AK) stage. This stage is designed to restore the natural alkalinity and mineral balance of the water. The RO process effectively generates pure water but it also removes a few helpful minerals in the process. The red mineral stone portion of the AK filter adds back healthy minerals including not just calcium, but also other beneficial minerals, like magnesium, that other systems don't. The calcite portion of the filter neutralizes the pH of the RO water. And the water tastes better too. Because RO water is so pure, many people find it tastes unnatural. Many people prefer the more natural taste that comes from the presence of some minerals in the water. Remineralization restores just the right proportion of healthy minerals.



Designed for do-it-yourself installation by most users, the entire system fits nicely under a standard kitchen sink. Installation is straightforward and all parts necessary for installation are included. You are guided by clear, well organized written instructions, instructional videos and access to iSpring’s unparalleled technical support.



The system is quiet and low maintenance. Replacement filters are standard sized and sold at factory direct pricing. A lead-free, solid brass faucet with brushed nickel finish is included with the system and is usually mounted on the counter as the primary source of drinking water, but output lines can also be connected to your ice maker, coffee maker, etc.



The whole system is backed by a 1-year money-back guarantee, a 1-year manufacturer warranty and iSpring's unique lifetime technical support provided right here in the USA in Alpharetta Georgia. With the RCC7P-AK, enjoy crisp-tasting, bottled quality water, every day, right in your home.



Incoming Water Pressure: 30 PSI - 70 PSI

Operating water temperature range: 40 – 100 °F

Maximum TDS: 750 ppm

• Reverse Osmosis requires high water pressure to force the impurities out of the water. RCC7P-AK’s extremely durable electric booster pump ensures high efficiency, reliable, and consistent performance regardless of pressure variations; delivering the highest performance for an RO system with less waste water.
• High Capacity Reverse Osmosis water filtration for safer, healthier water. This under sink mounted water filter and water softener removes up to 99% of over 1, 000 contaminants, including lead (removes up to 98% of lead), chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more.
• The RO membrane removes not only harmful pollutants but also a few helpful minerals. As a result, a standard 5 stage RO system produces slightly acidic water with a pH of 7. 0 or below. The iSpring RCC7P-AK includes an additional sixth stage - an Alkaline Remineralization filter which restores healthy minerals and produces a balanced alkalinity, which gives the water a more natural taste than regular 5 stage RO water.
• WQA Certified System with Premium quality components ensure highest reliability and low maintenance for many years to come. Clear see-through 1st stage housing makes filter inspection a snap. Pump power adapter: 100-240V 50/60Hz
• For indoor use only. Extended Manufacturer upon registration, support from Atlanta GA USA

User questions & answers

Question:	Is the pump always on, and can you hear it. Our living room is next to the kitchen and the background noise might be irritating
Answer:	The pump only runs when the water pressure in the tank drops to a preset level then shut off when the pressure is back up. I have mine off the bedroom in a cabinet and I have to touch the pump to make sure it is running. The pump make a slight noise when it start up for maybe a second or two. But after that you have to touch the pump to make sure it is running.
Question:	Does this filter out fluoride
Answer:	It's quite simple answer. Molecule of water is bigger then fluoride's, and that why it can't be filtered out. There's no filter on earth that's capable of doing it. The only way to filter out fluoride is thru distilling the water. Because boiling temperature of fluoride is greater than the water's. Thereafter fluoride's molecules do not boil off during distillation.
Question:	I saw other brands have 10 stage ak/ph filter, is that better or just a gimmick
Answer:	I did a lot of research on this topic and I can state that it is not necessary at all. I don’t know the system and the stages that the system has but it provably has a UV lamp or so, it would be useful if you are using well water os similar as it can have a lot of bacteria, otherwise it doesn’t make any sense. Your body needs minerals in the water to be healthy for you and experts says that is good to have a slightly alkaline water (ph ~8). A very filtered water would be nearly to destiled water what is not good for you in any case. I’m very happy with this system as it fulfills all the needs and expectations I had. I may say that the pump is a nice to have to improve the rejected ratio. I did a test and in my case with this system the values are 1:3 rejection, ph 8.1, EC 40us/cm, 22ppm really close to my previous mineral botteled water but a little bit more alkaline. Hope that helps.
Question:	Permeate pump v.s. booster pump, which one is better
Answer:	A permeate pump does not increase the feed pressure at all. It decreases the back pressure against the membrane in Pressure tank systems, the pressure it applies is not consistent. However, For open water storage systems and for incoming water pressure over 60psi, it's a waste of money. In those types it doesn't do anything to drain ratio and production speed. The booster pump on the other hand is almost a mandatory accessory if your water pressure is below 50 PSI or drops below 50F. At these feed water conditions, the RO unit is very inefficient and will not perform well. The booster pump will increase the feed pressure for ro unit to 80 psi regardless of back pressure. It will dramatically lower the drain ratio and speed up the water production.

Product features

Precision Performance

The RCC7P-AK is a pressure-boosted, multi-layered filter system that provides optimal protection against over 1,000 different types of contaminants, including arsenic, asbestos, chlorine, fluoride, lead, mercury, sodium, and more. Boosting the water pressure improves the performance of the Reverse Osmosis filter stage increasing water production speed and reducing waste water. This is essential when the home water pressure is low (below 40 PSI).

Reinforced Transparent 1st Stage Housing

Provides an easy way to visually inspect the sediment filter and view the contaminants being removed from your water. With the transparent housing you will know it is time for a filter change before a problem occurs.

Finest Micron, Layered Protection

The advantage of having both 5-micron GAC & CTO filters is that loose carbon (GAC, KDF) is better at trapping large contaminants, leaving only smaller ones to the CTO carbon block filter. This allows the CTO filter and RO membrane to function at their maximum efficiency and last longer.

Leak-Free System & Online Supporting Videos

Push to connect fittings and color coordinated tubings simplify the installation process. We know that high percentage of our customers prefer Do-it-yourself installation. We are investing in video production to provide our customers the resources needed to have successful installation and maintenance.

Tech Support

Contact our support team for assistance in selecting the right system for your water filtration needs. Now, and years from now, we will be right here and ready to help.

• 【Ultra-long service life】When used with municipal water, each undersink water filter has a maximum service life of 12 months or 8,000 gallons.[1]
• 【Innovative multistage filtration】The Waterdrop Direct Connect Undersink Water Filtration System uses innovative multistage filtration. And it can effectively reduces heavy metals, chemical pollutants, sediment and other large particles.[2] Enjoy healthy and pure water straight from your tap – no need to buy bottled water anymore!
• 【NSF certified filter】Specially selected premium materials are lead-free, which is fully certified by the WQA against NSF 372 standard. Activated carbon block and other advanced filter media ensure efficient and safe filtration. KDF effectively keep filter sanitary.Tested against NSF 42 standards, it effectively reduces chlorine, taste and odor. The BPA-free, lead-free material ensures more reliable use from the inside out.
• 【Premium dedicated faucet】The undersink water filtration system comes with a lead-free brushed stainless steel faucet. For separate faucet you already have, WD-15UC system ( Search ASIN: B085G9T9TB ) would be a better choice if you want to install it to the separate faucet you already have.
• 【Easy installation】This undersink water filtration system should be connected only to a cold water supply. With innovative push-to-connect fittings, installation takes less than 3 minutes. The twist-and-lock design helps you replace the filter in 3 seconds without any tools. The undersink water filtration system comes with a feed water adapter that can connect to the tubing. The 3/8’’–1/2’’ convertor fitting can connect this system to 1/2’’ or 3/8’’ cold water lines and faucets.
• 【Fast flow rate & multiple uses】The tested full flow rate of this undersink water filtration system is 0.75 gpm at 60 psi. The fast and stable water supply provides pure and fresh water that tastes like spring water. Developed for household and commercial use, Waterdrop Undersink Water Filtration System can be installed in your kitchen, RV, or office to meet your daily water needs.

User questions & answers

Question:	Are replacement filters available
Answer:	This bidet seat is powered by electricity and uses an Advanced Hybrid Water Heating System, the power cord is 3.5 ft and needs to be plugged into a GFCI outlet. You can use an extension cord but make sure it's a grounded (3 prong, 15 amp) extension cord.
Question:	do they sell the connector adapter to tie in the frig
Answer:	I just had my faucet 2 years and 2 days ago the spray mode won't change back to stream. I cleaned the filter and increased the water. I even tried to cleaned the handle. Once in while it would changed if I tried moving the handle in different angles.
Question:	Does this filter remove all chromium
Answer:	Hi, Had this for almost four (4) years and no buildup at all. Contact product owner.
Question:	Do you have to turn the water off each time to change the filter
Answer:	Mine does not stay in place and it swings AlWAYS to the right. I wish I had listened to the reviews and notnpurchased this faucet.

Product features

Money-saving

On average, you’ll spend 0.1 dollar per day for the first year. You’ll pay only 0.05 dollar per day for the filter replacement and your water quality will improve with each passing day. Enjoy pure drinking water for a long time.

Simple installation

The installation process is as user-friendly as it gets. Due to the innovative system design, installation takes only 3 minutes. Replacing the filter also takes only 3 seconds. The push-to-connect fittings make installation easier, saving you time and effort. You won’t need an additional plumbing service.

Premium dedicated faucet

This undersink water filtration system comes with a lead-free brushed stainless steel faucet, which is designed to provide safe filtered water. The combination of the dedicated faucet and your original faucet will separate the filtered water from unfiltered water, which will meet your various daily water needs.

Multiple applications

This filtration system is equipped with a lead-free brushed stainless steel faucet. It can be installed under your sink or in RV, dispensing clean drinking water anytime you need it.

For the system without an included faucet, please search for WD-UA.

The multistage filtration ensures a great user experience.

With a filtration accuracy of 0.5 μm, the Waterdrop Undersink Water Filtration System reduces pollutants, such as chlorine, taste and odor, sediment, rust, and other heavy metals.[2] You don’t have to worry about the safety of the filtered water.

The system also retains minerals that are essential to your body, such as potassium, calcium, sodium, and magnesium. Enjoy fresh water with Waterdrop.

Essential minerals

Home use—kitchen

The system filters out pollutants while retaining beneficial elements. It’s ideal for cooking, washing fruits and vegetables, and washing dishes. You can cook with pure filtered water and enjoy safe and delicious meals.

Office use—break room

The adequate water supply meets the water needs in your office. The system works without electricity and doesn’t produce waste water. You can directly connect the system to the original faucet, or you can install a Waterdrop Quick Connect Undersink Filtration System with a dedicated faucet.

Outdoor use—RV

The system is ideal for RV using. With the efficient filtration performance, the system delivers tasty purified water to meet with your various outdoor water needs. The specially added KDF ensure the filter hygiene even during non-camping season. The compact design saves much under sink space and brings more room for storage, say farewell to the bulky bottled water. For the ultimate RV water purification experience, please use along with Waterdrop RV Inline Filter.

Can the system reduce TDS?

To come straight to the point, TDS value isn’t directly related to water quality.

TDS stands for total dissolved solids. The higher the TDS is, the more impurities water contains. But what are impurities on earth? No matter beneficial natural minerals or harmful substances, they are all regarded as impurities in water.

As a result, water quality can’t be determined only by TDS value. It is just one of standards that reflect water condition and you can’t conclude that water with low TDS is definitely of good quality.

TDS has more influence on water taste, not overall water quality.

Waterdrop under counter water filter reduces harmful pollutants while retains natural minerals, thus ensuring purity and good taste of water at the same time.

Can the product filter well water?

No. This system is designed for Municipal Tap Water. If using well water as the source, please make sure the feed water has been through a pre-filtration system, otherwise, large particles in well water will clog the filter easily and shorten filter life. For the solution with a pre-filtration system, please search for WD-PFK on Amazon.

• 【Effectively Filtration】 This under sink water filter system tested against NSF standards, effectively reduce most of chlorine, lead, mercury, fluoride, arsenic, taste and odor. Compare with the traditional separated triple stage filter system, this system use high quality coconut carbon block, activates water molecules, significantly improves the taste of water.
• 【Smart filter life indicator】The smart indicating system allows you to check the working mode at a glance. By changing color, the electronic indicators on the front panel notify you when it’s time to replace the filters, thereby ensuring safe, clean, and healthy purified water all day long!
• 【Money save design】 The battery-driven water filter system does not require an undersink electricity supply and produces prime-quality purified water with zero waste water, allowing you to drink pure water and enjoy your exquisite life at a reasonable price.
• 【Advanced integrated waterway】This drinking water filter system adopts a cutting-edge integrated waterway to prevent water leakage, which allows you to replace the filters without cutting off the water supply. This provides you with a safe and secure water purification experience.
• 【DIY installation & 3-second filter replacement】 The dual carbon block water filtration system comes with a brushed nickel faucet, a 1/4” inlet hose, a 3/8” outlet hose, a 3/8”-1/2” feed water adapter, and other necessary accessories. Designed for home DIY, this under sink water filter system can be installed completely in less than 30 minutes. While in just 3 seconds, the filter can be changed with a single twist-pull.

User questions & answers

Question:	What are the prices of the replacement filters
Answer:	There's no indicator, but I would think the flavor of the water would be a good indication that it needs to he replaced. Our water tastes bad out of the tap and the filter removes it. Once bad flavor returns, we'll change it.
Question:	Where to buy filter replacement
Answer:	If you are referring to the pipe being crooked it will be held in place by the Control head. Control head should not be crooked, if it is you have it cross threaded.
Question:	Title says .5 micron but in the description it says the PP filter is .01 micron. Which is it
Answer:	Yes, contact the vendor you are thinking about purchasing from and they will be able to help you out. The folks at Aplus Water
Question:	Can i use waterdrop uf filter in this tsc system
Answer:	The Iron Eater Air Injection Oxidizing Filter System, as a single tank system, is an efficient and cost effective system for the removal of iron and sulphur. The Iron Eater maintains an “air pocket” in the top of the tank while the system is in service. As the water passes thru the air pocket, iron and sulphur are oxidized. Additionally, dissolved oxygen is added to the water. The iron blend filter media bed then removes the iron and sulphur from the water. The Iron Eater can remove up to 8 ppm Hydrogen Sulfide and up to 17 ppm Iron.

Product features

Dual carbon block filters

The carbon block filters can effectively reduce chlorine, lead, taste and odor, and other harmful heavy metals, greatly improving the taste of water, thereby ensuring safe, delicious drinking water.

Advanced integrated waterway

This under sink filter system has a cutting-edge integrated waterway to prevent water leakage. This allows you to replace the filters without cutting off the water supply, thereby giving you a safe and secure water purification experience.

Smart indicating system

The smart indicating system allows you to check the working mode at a glance. By changing color, the electronic indicators on the front panel will notify you when it’s time to replace the filters, thereby ensuring safe and clean purified water all day long.

Zero waste water

Unlike other water filtration systems that generate a lot of waste water, this drinking water filter system produces prime-quality purified water with zero waste water. Waterdrop understands the importance of fresh water and is dedicated to delivering purified water that is socially equitable, economically beneficial.

Best-tasting water

The dual carbon block water filtration system provides the best-tasting water while retaining beneficial minerals.

Extended service life

The advanced filter design allows the filters to perform with an extend service life up to 12 months, which reduces the frequency of future filter replacements and saves on maintenance costs.

Easy installation

Designed for home DIY, this under sink water filter system can be completely installed in approximately 30 minutes. In just 3 seconds, the filter can be changed with a single twist-pull, without tools.

Compact design

The sleek and compact design saves a lot of under-sink space and keeps your kitchen tidier and cleaner. Water is filtered directly and delivered immediately. You can enjoy a better kitchen and home experience.

Can this system reduce TDS?

Please note that this Undersink Water Filtration System cannot reduce TDS.

TDS stands for total dissolved solids. It is composed of inorganic salts and a small amount of organic matter. This filter cannot lower the TDS value because it removes harmful substances while retaining minerals such as potassium, calcium, sodium, and magnesium, which are beneficial for your body.

If you need to reduce TDS, the Waterdrop RO System will be an excellent choice. For details, please search ASIN: B07P1XFYJP, B082CZ9XZ9, B082D177MX.

Can the system filter well water?

No. This system is designed for Municipal Tap Water. If using well water as the source, please make sure the feed water has been through a pre-filtration system, otherwise, large particles in well water will clog the filter easily and shorten filter life.

Product description

Make the purest drinking water with your own home system. Great in the kitchen: Improve the taste of your cooking, coffee, ice, and drinks. Experience true Reverse Osmosis purification. Safe filtered fresh tasting H2O: Removes up to 99. 99% of contaminants including Lead, Chlorine, Fluoride, Cyanide, Giardia, Radium, Asbestos, Calcite, Heavy Metal, Bacteria, Viruses, Pharmaceuticals, and over 100 other contaminants. Get setup fast with our Quick Connect tubing system. Long lasting filters of the highest capacity standards mean you only need to change your system every six months. Includes fast flow faucet with 0. 8 GPM delivery. A compact system made to fit under counter in a cabinet. Best for house, apartment, residential, well water, industrial, rv, machine, and office uses. Certified by an independent laboratory to NSF standard 58. Comes with 4 gallon (3. 2 gallon water capacity) storage tank and tank stand. Your tank can sit upright or on it’s side to make sure it fits under most kitchen cabinets. Includes all filters needed for setup and first 6 months of use and extra filters for 1st replacement. Can be wall / cabinet mounted or freestanding, made for indoor use. Can be installed undersink, in a basement or other remote locations, you may need additional tubing or a delivery pump depending on how far away you plan to install or if you plan to link to a refrigerator as well. For every one gallon of water produced the system discharges between one and three gallons (depending on the pressure and quality of your incoming water). The system is compatible with 3/8" and 1/2" under sink connections. Includes filter housing wrench. Operates on 40-80 PSI water pressure, you may need a Booster Pump or Pressure Regulator depending on your water pressure. The water is cleaner and more convenient than any pitcher, faucet filter, or countertop systems. Express Water’s 5 Stage Reverse Osmosis Water Filtration System RO5DX is the complete solution for your drinking water.

• Reverse Osmosis Water Filter: Experience what water should taste like with the Express Water reverse osmosis water filtration system removing up to 99.99% of Lead, Chlorine, Fluoride, Nitrates, Calcium, Arsenic, Bacteria, and more.
• Water Purification System: Drink the healthiest water on Earth. All our water filters are specially engineered to work together, producing the safest and best tasting water you’ll ever drink
• Under Sink Water Filter: Don’t waste money on professional installation. Express Water’s quick and easy-to-understand design means you can install and understand everything about your new water filtration system
• Quality Guaranteed: Rest easy with our 1-year warranty on all Express Water Reverse Osmosis Water Systems
• Under Sink Water Filter System: No need to mess with refilling or activating your water filter, Express Water’s water filtration systems automatically fill your water tank with high quality drinking water
• Leak Detection: Each under sink water filter includes an emergency leak stop detector that shuts off water flow when it detects unwelcomed moisture
• Customizable RO Water Filter System: Express Water home water filtration systems are fully upgradable and customizable with quick connecting fittings. Try additional filtration attachments including UV Water Filter, Alkaline Water Filter, Deionization Water Filter, and more

Product features

Pure Healthy Water from Your Faucet

Start drinking healthy and stop drinking contaminants with your own home Reverse Osmosis Water Purification.

We have designed our system’s five stages of filtration to work together for long lasting high grade contaminant removal.

Choose the Express Water RO5DX and start drinking healthy today!

Unique Features

Express Water offers several features unique to this system

• Double Sealed Filters to preserve your filters and your kitchen. Each filter is double sealed to provide the best filtration efficiency and value.
• Our Leak Stop Valve shuts off water flow if excess water is detected. A fabric disk stays in contact with the floor beside your system. If for any reason water is absorbed the flow to your system is stopped.
• Included Brass Feed Adapter and Quick Connect Adapter means no going to the hardware store to buy parts. The feed adapter fits the two most common sizes of under sink pipes 1/2" and 3/8".

Save Your Time

Filter changes are quick and easy with simple design and clear labels

• Your pre-filters are swapped out only twice a year: Sediment, Carbon Block, Granular Activated Carbon
• The others are replaced only once a year: RO Membrane, Post Carbon, Alkaline
• Our Quick Connect system is fast, easy, and helps prevent leaks
• A labeled color matched system so you know what goes where at a glance

Water When You Need It

With efficient filtration and quick delivery get your water fast.

• Chrome faucet with brass water way for pure water delivery
• Fast Flow Rate: Get your water fast. Water through your faucet at 0.8 GPM!
• Always Ready: This system can produce 50 gallons of pure water a day
• An adult should drink 0.5-1.55 gallons of water a day. Makes more than enough water for the whole family!

Fully Upgradeable

Every Express Water Water System is fully upgradable and customizable. With standard quick connect fittings it’s easy to add to or change your system to fit your needs.

When you move to a new place or if an earthquake or storm affects the local water your filtration needs may change.

Even if your water changes you can keep your RO System. With our simple design you can add or remove filters in minutes.

Premium Quality

• NSF Certified: Meets or exceeds NSF standard 58 for system construction. Certified for lead free construction, reduction of dissolved solids, and cycle test reliance.
• Air Jet: Every system is checked for leaks by an air injection pressure test
• Water Pressure: Each component undergoes intense high water pressure tests to ensure durability
• Cycle Resistance: Systems undergo simulated heavy use to make sure they can handle anything
• License#C0393496-01 Issue Date: October 22nd 2018

Here to Help

Our water technicians are here to answer any questions you may have about your system or your home’s water in general. If you run into a question or problem, we want to help you through it. We’re not happy unless you are.

• Have any questions about your system or your home’s water answered by experts
• Questions before buying? Just give us a call!

• 【Compatibility】Suitable for faucets with 1/2" or 3/8" FEMALE NPT thread. In the event of a different connection type, please contact us BEFORE purchase.
• 【Ultra-long service life】When used with municipal water, each filter has a maximum service life of 24 months or 16,000 gallons.[1]
• 【Innovative multistage filtration】The Waterdrop Direct Connect Undersink Water Filtration System uses innovative multistage filtration. And it can effectively reduces chlorine, heavy metals, chemical pollutants, sediment and other large particles.[2] Enjoy healthy and pure water straight from your tap – no need to buy bottled water anymore!
• 【NSF certified filter】Specially selected premium materials are lead-free, which is fully certified by the WQA against NSF 372 standard. Activated carbon block and other advanced filter media ensure efficient and safe filtration. KDF effectively keep filter sanitary.Tested against NSF 42 standards, it effectively reduces chlorine, taste and odor. The BPA-free, lead-free material ensures more reliable use from the inside out.
• 【Easy installation】The system should be connected only to a cold water supply. With innovative push-to-connect fittings, the entire installation process takes less than 3 minutes. The twist-and-lock design ensures that you can replace the filter in 3 seconds. The system includes a 3/8” hose with a direct connection that adapts to standard 3/8’’ feed water valves under US sinks. The 3/8’’–1/2’’ convertor fitting helps you connect the system to both 1/2’’ and 3/8’’ cold water lines and faucets.
• 【Fast flow rate & multiple uses】The fast and stable water supply provides pure and fresh water that tastes like spring water. The tested full flow rate is 0.75 gpm at 60 psi. Developed for household and commercial use, the Undersink Water Filtration System can be installed in your kitchen, bathroom, RV, or office to meet your daily water needs. Ideal for drinking, cooking, skincare, and cleaning.

Product features

Money-saving

On average, you’ll spend 0.09 dollar per day for the first year. You’ll pay only 0.04 dollar per day for the filter replacement and your water quality will improve with each passing day. Enjoy pure drinking water for a long time.

Simple installation

The installation process is as user-friendly as it gets. Due to the innovative system design, installation takes only 3 minutes. Replacing the filter also takes only 3 seconds. The push-to-connect fittings make installation easier, saving you time and effort. You won’t need an additional plumbing service.

Stable and fast water flow

The system has a stable water flow and high filtration efficiency. The tested full flow rate is 0.75 gpm at 60 psi. You’ll get filtered water without the wait.

Multiple applications

The system is designed to connect to your original faucet. It can be installed under your sink or in RV in multiple ways.

For the solution with a Waterdrop dedicated faucet, please search for WD-UB.

The multistage filtration ensures a great user experience.

With a filtration accuracy of 0.5 μm, the Waterdrop Undersink Water Filtration System reduces pollutants, such as chlorine, taste and odor, sediment, rust, and other heavy metals[2]. You don’t have to worry about the safety of the filtered water.

The system also retains minerals that are essential to your body, such as potassium, calcium, sodium, and magnesium. Enjoy fresh water with Waterdrop.

Essential minerals

Home use—kitchen

The system filters out pollutants while retaining beneficial elements. It’s ideal for cooking, washing fruits and vegetables, and washing dishes. You can cook with pure filtered water and enjoy safe and delicious meals.

Home use—bathroom

The stable water flow rate ensures that you can use clean water immediately. The system reduces pollutants in tap water that lead to dry skin and nervous system problems. The filtered water is ideal for face washing, skincare, and personal cleansing, as it maintains skin vitality.

Office use—break room

The adequate water supply meets the water needs in your office. The system works without electricity and doesn’t produce waste water. You can directly connect the system to the original faucet, or you can install a Waterdrop Quick Connect Undersink Filtration System with a dedicated faucet.

Outdoor use—RV

The system is ideal for RV using. With the efficient filtration performance, the system delivers tasty purified water to meet with your various outdoor water needs. The specially added KDF ensure the filter hygiene even during non-camping season. The compact design saves much under sink space and brings more room for storage, say farewell to the bulky bottled water. For the ultimate RV water purification experience, please use along with Waterdrop RV Inline Filter.

Can the system reduce TDS?

To come straight to the point, TDS value isn’t directly related to water quality.

TDS stands for total dissolved solids. The higher the TDS is, the more impurities water contains. But what are impurities on earth? No matter beneficial natural minerals or harmful substances, they are all regarded as impurities in water.

As a result, water quality can’t be determined only by TDS value. It is just one of standards that reflect water condition and you can’t conclude that water with low TDS is definitely of good quality.

TDS has more influence on water taste, not overall water quality.

Waterdrop under counter water filter reduces harmful pollutants while retains natural minerals, thus ensuring purity and good taste of water at the same time.

Can the product filter well water?

No. This system is designed for Municipal Tap Water. If using well water as the source, please make sure the feed water has been through a pre-filtration system, otherwise, large particles in well water will clog the filter easily and shorten filter life. For the solution with a pre-filtration system, please search for WD-PFK on Amazon.

Product description

The APEC3 stage water filtration system delivers clean filtered water at an affordable price. This complete 3-stage water filter system is made from high Caliber components to offer long-lasting, reliable performance. The three premium quality filters lasts over 12 months for fewer filter change outs and high performance. Designed and assemble in the USA, the system provides a continuous on demand supply of quality filtered water directly to your tap. • 1st stage: high-grade 10 inch high-capacity polypropylene sediment filter -removes dust, particles, and rust. 100% pure polypropylene depth filter with exceptional dirt-holding capacity translates to longer life and fewer change-outs than existing string-wound or resin-bonded filters. • 2nd stage: premium extruded carbon block 10 inch -gets rid of unpleasant chlorine, tastes, odors, cloudiness and colors. Also removes vocs and other common chemicals from the water. • 3rd stage: premium extruded carbon block 10 inch - further removes chlorine, tastes, odors, and other common chemicals from the water to provide great filtered water.

• High quality, designed, engineered and assembled in the USA; System built with US MADE super capacity filters for long lasting dependable filtration
• Guaranteed to remove chemicals (i.e. chlorine), taste and odors. NOT designed for TDS removal
• Premium long-lasting filters used to treat tap water, well water. Provide unlimited refreshing water
• 1 year satisfaction guarantee, with lifetime support by certified WQA water specialist based in CA
• System comes with 100% Lead-Free chrome faucet, odorless, chlorine-free clean water
• Feed Water Pressure: 20-85 psi

User questions & answers

Question:	Can the outlet be adapted to standard plumbing? i plan to mount this away from the sink and already have 1/2" pex plumbing to connect to
Answer:	Yes. I did that today when I installed the water filter. Due to the way my 1/2" PEX plumbing was set up, I had to install a 1/2" shut-off valve that reduces to a 3/8" male thread in one unit. I added a 3/8" reducer to 1/4" to hook up the tubing from this kit. Make sure you install a shut-off valve between the water filter and the PEX line because you need to isolate the water filter on both sides when you replace the filters.
Question:	Will this system remove copper from my water? My tap water tests dangerously high in copper and I need to filter it out
Answer:	Hello, the WFS-1000 unit is designed to remove sediment particulates and chemical compounds from a water source, not heavy metals such as copper. To help remove copper efficiently please consider our reverse osmosis filtration systems for reference. If you need any help or assistance, feel free to give us a call we are happy to help! Best Regards, APEC Support Team 800-880-4808.
Question:	What size and quality tubing does this system need? It is 1/4 or 3/8". What size T valve does it need to connect under the sink to cold water side
Answer:	The system comes with 1/4" food grading tubing for the connection. It also includes a feed water adapter that routes the water from the cold water line to the system. After the water is filtered, it is routed to a dedicated water dispenser for usage.
Question:	Does this system remove fluoride and lead
Answer:	Hello, no the WFS-1000 system is designed to remove chemical compounds and sediment from a water source. To help remove fluoride, lead, and other heavy metals, please consider our Reverse Osmosis filtration systems such as the ROES-50 and RO-90. If you need any help or assistance, feel free to give us a call we are happy to help! Best Regards, APEC Support Team 800-880-4808.

Product features

Super Capacity Filters

Three premium U.S. made super capacity filters last over 12 months for fewer filter changes and higher performance.

Fast Water Flow & No Tank Needed

Enjoy clean, filtered water instantly. This 3 stage system filters water quickly to your faucet.

No Rinse Water

This system does not waste water or require regular filter flushing, so all of the water going into the system goes straight into your cup.

Keep Important Minerals

Removes chemicals, tastes, odors, and VOCs from your water while still keeping important minerals and alkalinity!

• 【Compatibility】Suitable for faucets with 1/2" or 3/8" FEMALE NPT thread. In the event of a different connection type, please contact us BEFORE purchase.
• 【NSF certified filtration】 The Waterdrop Direct Connect Undersink Water Filtration System uses innovative multistage filtration. Tested against NSF 42 standards, the system effectively reduces chlorine, taste and odor. And it can effectively reduces heavy metals, chemical pollutants, sediment and other large particles.[1] Enjoy healthy and pure water straight from your tap – no need to buy bottled water anymore!
• 【Superior material】 With a filtration accuracy of 0.01 μm, the Ultrafiltration membrane filters out pollutants larger than 0.01 μm. Activated carbon block and other advanced filter media ensure efficient and safe filtration. KDF effectively keep filter sanitary. Specially selected premium materials are lead-free, which is fully certified by the WQA against NSF 372 standard. The BPA-free, lead-free material ensures more reliable use from the inside out.
• 【Easy installation】 The system should be connected only to a cold water supply. With innovative push-to-connect fittings, the entire installation process takes less than 3 minutes. The twist-and-lock design ensures that you can replace the filter in 3 seconds without any tools. The system includes a 3/8” hose with a direct connection that adapts to standard 3/8’’ feed water valves under US sinks.
• 【Ultra-long service life】 When used with municipal water, each filter has a maximum service life of 3 years or 19,000 gallons.[2] Thus, you won’t need to replace the filter nearly as often as you would with pitcher and faucet water filters. For better filtration, we recommend that you replace the filter every 36 months.
• 【Fast flow rate & multiple uses】 The fast and stable water supply provides pure water that tastes like spring water. The tested full flow rate is 0.75 gpm at 60 psi. Developed for household and commercial use, the Undersink Water Filtration System can be installed in your kitchen, bathroom, RV, or office to meet your daily water needs. Ideal for drinking, cooking, skincare, and cleaning.

User questions & answers

Question:	Can the under-sink filter be installed in the horizontal orientation (assuming it is secure
Answer:	The device comes with a built-in lithium battery and water pump and and has a power of 90 watts. Pressurization can be achieved after the device is powered on. The device is powered by a built-in lithium battery or a 12V car charger (via car cigarette lighter). The lithium battery is suitable for charging 100-240V household power.Thank you
Question:	What is the difference between the 17ua and the 15ua
Answer:	China
Question:	Is there a replacement filter Cartridge or do you have to replace the whole thing each time
Answer:	Hi Customer, Thanks for your support, the bottom size of this shower tent is 4'x4', and the height of this shower tent is 7', thanks. Best Regards Alvantor
Question:	I thought this listing used to say this filter was nsf/ansi 53 certified - i see that the application is "pending" in other listings - any updates
Answer:	Hi, our shower tent is light-weight, and it is can move, the bottom can be removed, so don't worry about drain the water.

Product features

Innovative ultrafiltration technology

With a filtration accuracy of 0.01 μm, the Waterdrop Undersink Water Filtration System can effectively reduces most of pollutants such as chlorine, taste and odor, sediment, rust, other heavy metals and harmful substances.[1]

Money-saving

On average, you’ll spend 0.08 dollar per day for the first year. You’ll pay only 0.04 dollar per day for the filter replacement and your water quality will improve with each passing day. Enjoy pure drinking water for a long time.

Simple installation

The installation process is as user-friendly as it gets. Due to the innovative system design, installation takes only 3 minutes. Replacing the filter also takes only 3 seconds. The push-to-connect fittings make installation easier, saving you time and effort. You won’t need an additional plumbing service.

Multiple applications

The system is designed to connect to your original faucet. It can be installed under your sink or in RV in multiple ways.

For the solution with a Waterdrop dedicated faucet, please search for WD-UB.

The multistage filtration ensures a great user experience.

The advanced Waterdrop Undersink Water Filtration System employs an UF membrane with a filtration accuracy of 0.01 μm, reducing most of pollutants such as chlorine, taste and odor, sediment, rust, and other heavy metals.[1] You don’t have to worry about the safety of the filtered water.

The system also retains minerals that are essential to your body, such as potassium, calcium, sodium, and magnesium. Enjoy fresh water with Waterdrop.

Essential minerals

Home use—kitchen

The system filters out pollutants while retaining beneficial elements. It’s ideal for cooking, washing fruits and vegetables, and washing dishes. You can cook with pure filtered water and enjoy safe and delicious meals.

Home use—bathroom

The stable water flow rate ensures that you can use clean water immediately. The system reduces pollutants in tap water that lead to dry skin and nervous system problems. The filtered water is ideal for face washing, skincare, and personal cleansing, as it maintains skin vitality.

Office use—break room

The adequate water supply meets the water needs in your office. The system works without electricity and doesn’t produce waste water. You can directly connect the system to the original faucet, or you can install a Waterdrop Quick Connect Undersink Filtration System with a dedicated faucet.

Outdoor use—RV

The system is ideal for RV using. With the efficient filtration performance, the system delivers tasty purified water to meet with your various outdoor water needs. The specially added KDF ensure the filter hygiene even during non-camping season. The compact design saves much under sink space and brings more room for storage, say farewell to the bulky bottled water. For the ultimate RV water purification experience, please use along with Waterdrop RV Inline Filter.

Can the system reduce TDS?

To come straight to the point, TDS value isn’t directly related to water quality.

TDS stands for total dissolved solids. The higher the TDS is, the more impurities water contains. But what are impurities on earth? No matter beneficial natural minerals or harmful substances, they are all regarded as impurities in water.

As a result, water quality can’t be determined only by TDS value. It is just one of standards that reflect water condition and you can’t conclude that water with low TDS is definitely of good quality.

TDS has more influence on water taste, not overall water quality.

Waterdrop under counter water filter reduces harmful pollutants while retains natural minerals, thus ensuring purity and good taste of water at the same time.

Can the product filter well water?

No. This system is designed for Municipal Tap Water. If using well water as the source, please make sure the feed water has been through a pre-filtration system, otherwise, large particles in well water will clog the filter easily and shorten filter life. For the solution with a pre-filtration system, please search for WD-PFK on Amazon.

Product description

Simpler and more compact than Reverse Osmosis systems, the CU-A4 is an excellent choice for most general water filtration applications. The advanced 4-stage design of the CU-A4, featuring a unique combination of Activated Carbon, Ultra Filtration and KDF filters, virtually eliminates a wide variety of unhealthy contaminants, including bacteria, algae, fungi, giardia, lead, arsenic, iron, nickel, chromium, cadmium, calcium, aluminum, mercury, chlorine and chlorine treatment by-products, pesticides, hydrogen sulfide and other organic compounds. You experience safer, healthier and better-tasting water, without the hassle, expense and negative environmental impact of bottled water. The CU-A4 is flexible, quiet and durable. It has no moving parts and is very easy to maintain – only requiring occasional filter replacement. spring's high-capacity, high-performance filters last up to twice as long as other filters and provide maximum water flow – a difference you’ll notice when you turn on the faucet. The spring “Twist on / Twist off” filter design means changing filters couldn’t be easier. A lead-free faucet with beautiful finish, included with the system, is usually mounted on the counter as the primary source of drinking water, but with a wide range of optional parts and accessories, the CU-A4 easily adapts to fit nearly any refrigerator or ice maker connection. Contact spring directly and speak with a product specialist, to make sure you get the right filter options for your needs. We know that many customers prefer do-it-yourself installation, so the CU-A4 has been designed from the ground up to be easy for most users to install themselves, using readily available tools. Our push-to-connect fittings and color-coded tubing simplify the installation process and minimize the possibility of leaks. A well-organized instruction manual guides you step-by-step through the entire installation and testing process. If you do run into an issue, or get stuck, our technical support team is ready to assist you, Monday thru Friday between the hours of 9am to 5pm Eastern time. The whole system is backed by a 1-year money-back , a 1-year manufacturer and spring's unique lifetime technical support provided right here in the USA in Alpharetta Georgia. So, if you have a need to reduce overall dissolved solids in the water (reduce TDS) or to remove heavy concentrations of harmful metals like lead or copper, then an Reverse Osmosis system like the spring RCC7 is recommended. But for all-around high-performance water filtration, or where space is at a premium, the CU-A4 is the best, most economical and flexible choice for clean, fresh, great-tasting water instantly. NOTE: If you plan to use the CU-A4 as an inline filter (meaning using it without the included air-gap faucet), your incoming water pressure needs to be 40 PSI or below. If it is above that, a 40 PSI pressure regulator (APR40) should be installed on the input line to keep the pressure on the system at 40 PSI or below. Please contact us if you plan to “tee off” the pure water line and connect it to your fridge, as you would need a regular RO faucet along with a pressure regulator.

• SUPERIOR PERFORMANCE: The advance 4-stage design, which includes both Ultrafiltration and KDF/GAC stages removes up to 99% of most problematic pollutants such as chlorine and chlorine treatment by-products, lead, arsenic, and much more, while retaining healthy minerals. Noted: This system does not affect TDS as Reverse Osmosis System does
• 4-Stage ULTRA FILTRATION SYSTEM: PP Sediment Filter ((5 microns) removes larger particles like rust, sand, dirt. ) Ultra Filtration Filter (contains hollow fiber membrane technology with a pore size of just 0.01 microns. ) KDF and GAC Filter (provides much better control of particularly problematic contaminants including chloramine, hydrogen sulfide, heavy metals, and other compounds). Fine Activated Carbon Filter (provides final polishing before the purified water).
• SIMPLE AND FLEXIBLE: NO WASTE WATER and No storage water tank required. The CU-A4 provides highly effective water filtration for any number of clean-water needs - at the sink, in the refrigerator, for coffee makers and more.
• FEATURES: Come with premium Chrome finish drinking water faucet. All filters, tubing and other water-contacting parts are manufactured to comply strictly with NSF/ANSI standards for safety and water quality.
• EASY-TO-INSTALL AND REPLACE FILTER: Push to connect fittings with color-coded tubing simplify the installation process. Filter replacement are designed for ease. No need to disconnect hoses or water lines. Just Twist On / Twist Off filter cartridges make changing filters a snap. Filter life: 6 -12 months, depending on your source water and usage.

User questions & answers

Question:	What's the advantage of this water filter compared to a reverse osmosis system
Answer:	We chose this system because we wanted to have something that doesn't produce waste water. Since this is not a reverse osmosis system, it doesn't lower the TDS. We're on city water so it's perfect for us since our TDS is only around 56. Also, it doesn't remove the healthy minerals from the water like an RO system does. It doesn't require a storage tank either so we could fit this unit in a cabinet above our fridge! Everything worked out great for us.
Question:	What is no pressure faucet and why do you need it for this filter
Answer:	That's a great question...Normally, when an under sink filter is installed, the filter is "inline" with your water line and sees the full pressure of your home's waterline at all times...(it's a 2-way valve). So if your water line is typically at 60 psi, that is the pressure that your filter experiences when your water filter valve is closed. This is a problem, since the filter system is the weakest link in your water line, and if the filter fails while under pressure, you have a flood in your home...This filter system has a 4 way valve, so when the valve is open, the water from your water line is directed to the inlet of your filter...When the water valve is closed, the water line pressure is isolated from the filter, and the inlet of the filter is connected to the outlet of the filter (no pressure on the filter) So your filter never sees the full pressure of your water line...This virtually eliminates the potential for catastrophic flooding due to a filter failure...I had a precious under sink filter system and every time I changed the filter the filters would leak, because they were always under pressure and the o-ring system in the filter housing was compromised...This is not a problem for me now because with the 4-way valve in this system, when the valve is closed, the filter has zero pressure on it...
Question:	Has anyone tested the water that comes out of the filter with a TDS meter? I checked mine today and found that the TDS was the same as the tap water
Answer:	Per Josh @ iSpring 3/7/2017 - this will not remove minerals present in your city's tap water, so there should be little difference in total dissolved solids (TDS) count.
Question:	How many gallons of water will be treated during a filter's lifespan, before they need to be replaced? Also, is there a change indicator
Answer:	The actual gallon life will vary from customer to customer. As with all replaceable filter cartridges, they have limited space to hold the contaminants they remove from your water. This means that the higher concentration of junk you have in your source water, the faster the filters will run out space to keep filtering and vice versa. The average is about 1100 gallons, but this number may not represent your source water, so individual results could either be more or less than the average.

Product features

Easy Installation And Maintenance

The CU-A4 is designed to be simple to install and simple to maintain. Push to connect fittings and color-coded tubing simplify the installation process. iSpring Twist On / Twist Off filter cartridges make changing filters a snap.

Ultra Filtration (UF) Filter

The Ultra Filtration (UF) stage contains hollow fiber membrane technology with a pore size of just 0.01-micron, surpassing the performance of both carbon block and 'portable mini' water filters.

KDF + GAC

The CU-A4 is the only filter in its class to offer Kinetic Degradation Fluxion (KDF) Media which adds an important additional layer of protection to control metals.