8 best electric composting toilet

Electric composting toilets are innovative sanitation solutions designed to process human waste in an eco-friendly and odorless manner.These toilets are particularly popular in settings where traditional sewage systems are impractical or unavailable, such as recreational vehicles (RVs), boats, cabins, or off-grid homes. Here are key points related to electric composting toilets:

  1. Composting Process:

    • Electric composting toilets utilize a composting process to break down human waste into a nutrient-rich compost material. This is achieved through the action of beneficial microorganisms and decomposition.
  2. Electric Components:

    • The "electric" aspect of these toilets often refers to a fan or ventilation system powered by electricity. This system helps maintain proper aeration within the composting chamber, facilitating the decomposition process and preventing odors.
  3. Ventilation System:

    • A key feature is the ventilation system that continuously pulls air from the toilet bowl to the outside. This airflow promotes aerobic decomposition, reducing the volume of waste and minimizing unpleasant odors.
  4. Separation of Liquid and Solid Waste:

    • Many electric composting toilets feature a design that separates liquid and solid waste. Liquid waste is typically diverted to a separate container, while solid waste is mixed with organic material (like coconut coir or peat moss) to aid in decomposition.
  5. Compact Design:

    • Electric composting toilets are often designed to be compact and space-efficient, making them suitable for various applications, including RVs, boats, and small living spaces.
  6. Waterless Operation:

    • These toilets are waterless or use minimal water, contributing to water conservation efforts. They are well-suited for situations where a traditional flush toilet is impractical.
  7. Off-Grid Capability:

    • Electric composting toilets are ideal for off-grid living, as they don't require a connection to sewage or water systems. This makes them suitable for remote cabins, tiny homes, or sustainable living setups.
  8. Minimal Maintenance:

    • While some periodic maintenance is necessary, electric composting toilets generally require less maintenance compared to traditional septic systems. Regular emptying of the composting chamber and proper ventilation are key tasks.
  9. Odor Control:

    • The ventilation system, along with the separation of liquid and solid waste, helps control and minimize odors. Proper use of bulking agents, such as composting material, further contributes to odor reduction.
  10. User-Friendly Controls:

    • Electric composting toilets may include user-friendly controls for adjusting ventilation settings, monitoring composting progress, and managing other features.
  11. Brands:

    • Various brands manufacture electric composting toilets, including Nature's Head, Separett, Sun-Mar, and others.
  12. Environmental Impact:

    • Electric composting toilets are considered environmentally friendly because they reduce water consumption and offer a sustainable way to manage human waste.

It's important for users to follow manufacturer instructions for installation, usage, and maintenance to ensure the effective and sanitary operation of electric composting toilets. These toilets provide an alternative sanitation solution that aligns with eco-friendly and off-grid living principles.

Below you can find our editor's choice of the best electric composting toilet on the market
  

Sun-Mar Excel Non-Electric Self-Contained Composting Toilet, Model# Excel-NE

SUN

Based on 13 reviews Check latest price

Product description

The Sun-Mar Excel non-electric self-contained composting toilet odorlessly converts human waste into safe fertilizing soil. This model is designed for medium to high capacity use, ideal for a 2-3 people in a residential setting or 5-7 people at a cabin for a weekend. NSF/ANSI Certified: Yes, Application: Toilet needs, Drain (qty.): 1, Usage: Medium to high capacity, Self Contained: Yes, Electric: No, Vent Stack Size (in.): 4, Venting Kit Included: Yes, Dimensions L x W x H (in.): 33 x 22 1/2 x 32

  • Non-electric model; ideal for applications off the grid
  • Low profile unit complements any bathroom
  • Uses no water
  • 100% non-polluting
  • Includes variable diameter bio-drum with recessed handle for processing compost

User questions & answers

Question: does this evaporate urine
Answer: This would be a better question to ask to Sun-Mar directly, us distributors wouldn't really know such a technical questions. I would assume so.
Question: Can the toilet be used year round in a non heated cabin where temps get to
Answer: The package dimensions are 36" L x 28" W x 37" H. The shipping weight is 100 lbs.
Question: hi can you please tell me the size and weight of the packaged product (the way it would ship)? Thank you
Answer: Sun-mar composting toilets can freeze but the composting process will slow down. Once the area warms up again then the composting process will continue.
Question: Looking for a compost toilet for a remote cabin that is used a few months of the year. Which model if cleaned can we allow to freeze
Answer: Perfect sizing

Nature's Head Self Contained Composting Toilet with Close Quarters Spider Handle Design

Nature's Head

Based on 436 reviews Check latest price

Product description

The Nature's Head Composting Toilet is the latest design, the best value, and the most reliable choice for portable, self contained, urine separating dry toilets -- on the water, on the land, or on the road." "This toilet or head, (the marine term for toilet) was designed by two long time sailors who sought to create a more user friendly version than anything else on the market. While we designed our product to withstand the harsh marine environment, it can be used anywhere you need a toilet, especially anywhere that plumbing or electricity is difficult or non-existent -- on RVs or campers, in vacation cabins, workshops, barns, yurts, even trucks. Most importantly, this toilet doesn't have the foul odors associated with all other holding tank systems. The low volume air circulation fan built into the head provides the added benefit of recycling the air in your bathroom which helps make your whole environment smell better. Because it was originally designed for marine use, its rugged design and materials (all stainless hardware) it has been proven to be extremely durable no matter what your environment.

  • No one - and I mean no one - will beat my customer service and individual support
  • Easy to install by any reasonably handy person.
  • Absolutely No Odor. No Maintenance. 5 Year Warranty.
  • Huge Capacity. 2 people using full time will empty every 4-6 weeks. Easy empty in 5 minutes.
  • A vast improvement over older composting toilet designs. This one works!

User questions & answers

Question: does this toilet come wit a manufactures warantee
Answer: I have always got the Kirkland bath tissue been buying it for six years.I really like the bath tissue
Question: Does the fan need to be on 24/7? And since the top flips backwards I assume you can't put this up against a wall too closely
Answer: Yes. the Kirkland tissue width is 4" wide by 3.5 " long. Most tissue paper holders are 5" wide, I believe. Keep in mind the width of most tissue papers have shrunk to less than 4 inches wide. they used to be 4" x 4".
Question: What sort of maintenance is required on this thing? How many lbs of waste would it hold sanitarily, and what are the procedures for keeping it clean
Answer: el precio es muy alto creo que aprovecharon el momento y no esta bien .
Question: I need a toilet for a cabin for 2 to 3 people for 4 month's a year will this do the job
Answer: I have a septic tank and use RID X every month but I burn my toilet paper. I do not put it in the septic tank. This is the best tissue I have ever used.

Thetford 35831 Electra Magic Toilet

Thetford

Based on 17 reviews Check latest price

Product description

Thetford 35831 Electra Magic Toilet

  • Thetford 35831 Electra Magic Toilet
  • Country of Origin: UNITED STATES
  • Package Weight: 11.271 kilograms
  • Package Dimension : 44.45 cms L x 50.8 cms W x 58.42 cms H

User questions & answers

Question: What comes with the toilet? Vent kit or slide-ez valve
Answer: This stool has a tank that you put 3gal. of water and sanitizer in. It holds a total of 7 gal with waste. Then you can dump into larger holding tank. The thing you should know, is that this stool doesn't come with the plumbing necessary to hook it to water system. If you don't have what is necessary from your old stool, you will need to buy this too.
Question: From what I read this has a small holding tank that you can emty later
Answer: No. It attaches to a (not included) flange.
Question: Does this come with the flange
Answer: It is either mounted to a holding tank or discharge line by the under toilet flush valve body, that is sold as a separate part by Thetford part number 51730. You pull the lever out at the bottom of the toilet and the slide valve releases the contents it into a waste holding tank or into the sewer line for discharge at a camp site. The toilet is pretty much permanently mounted to the floor, would be troublesome to have to remove it to dump as it would be heavy with up to 7 gallons of waste and having to disconnect the 12-volt power wires and if equipped, the fresh water recharge hose.
Question: How does one empty it
Answer: It depends a lot on temperature. The warmer it is, the more urine evaporates. You can also get the 12V or solar fan option that evaporates more. And per Shelaghd's suggestion, it's easy to make a French drain by just digging a small hole, filling with gravel, and running the over-flow line into it. (Also, 15% urine diluted with water is probably the best nitrogen fertilizer for plants.)

Product features

Thetford 35831 Electra Magic Toilet

  • For use in boats, RVs, buses and other land-based and marine applications
  • Recirculating toilet uses very little water - Ideal for those who don't have a holding tank
  • Convenient push-button flushing
  • Operates on 12- or 24-volt hookup
  • Large, contoured seat offers full-size comfort
  • Easy-to-read Level Indicator

Saniflo Toilet - Two-piece SaniPlus 002/087/005

Saniplus

Based on 34 reviews Check latest price

Product description

SaniPLUS BENEFITS: The SaniPLUS is a system that is used to install a complete bathroom up to 15 feet below the sewer line, or even up to 150 feet away from a soil stack. The SaniPLUS pump is designed to connect with: 1- This SaniPLUS Upflush Toilet 2- Any Sink 3- Any Shower 4- Any Bath SaniPLUS INSTALLATION: The SaniPLUS is simplicity itself to install; there are just four connections. 1- The macerating/pump is connected to the spigot of a horizontal outlet toilet. 2- The toilet tank is connected to the water supply. 3- The macerating/pump is connected to the small diameter discharge pipe work. 4- The macerating/pump is connected to the electrical supply. Then optionally connect the discharge pipes from the sink, shower and/or bath. SaniPLUS FUNCTION: The inside of the SaniPLUS comprises of a pressure chamber, which starts and stops the unit, and the motor, which drives the stainless steel macerator blades and the pump. When the flush is activated, the water flowing into the SaniPLUS activates a microswitch in the pressure chamber, which in turn starts the motor. The motor is sealed for life in oil filled enclosure. A common spindle drives the impeller and the macerator blades. The moving parts therefore are kept to an absolute minimum. Water and organic waste matter, enter the chamber and are reduced to slurry as the macerator blades rotate at 3600 RPM. The centrifugal force causes the reduced solids to be ejected through a grill into the container where it is picked up by the impeller pump mounted beneath the motor. The pump operates at 10 PSI and pumps the effluent upward to 12 feet and/or 150 feet horizontally. In addition to the toilet waste, SaniPLUS will also discharge gray wastewater from a variety of other sanitary fixtures, such as: a hand basin, a bath, a bidet and a urinal. SaniPLUS WARRANTY: Full 2 year manufacturer warranty for repair or replacement.

  • BENEFIT : Install a bathroom anywhere without breaking up the floor!
  • INCLUDES : SaniPLUS macerating bathroom pump + White toilet bowl (elongated) + White toilet tank
  • (Saniflo UPC#s 002, 007 and 005)

User questions & answers

Question: Trying to figure out the difference between the plus, access 3 and access 2. is it worth the extra $ to purchase the plus
Answer: Extremely well. We have the tub and sink which drains into the toilet and then the pump shoots it 8 feet to the drain that goes to this part of the house which is the kitchen above our down stairs bathroom. I have had this over a year now and I have a total of 3 people that live here and have had no problems at all. I do flush more than you would a regular toilet only because I don't want to put a strain on the pump motor but there is nothing saying that it has to. The pump works like a very large garbage disposal. So it is working the same except for human waste instead. I give it 4 stars. The best you can buy.
Question: How well does it drain a tub
Answer: It will only flush once. Then the tank will be full. It needs power to pump out tank.
Question: What happens if one flushes the toilet when there's a power outage
Answer: No it doesn’t but it’s a great toilet. I’ve had mine over two years and it works great
Question: Does this include the toilet seat
Answer: Not sure exactly, but as I recall it was about 5, 6” above but somewhat flexible
Question: How high above the floor is the inlet hole for a drain pipe from a sink
Answer: Yes & no. Yes, you can install on top of existing toilet drain, but no, to do so you would have to cap existing toilet drain (to prevent sewer gas from escaping) and tie sanicompact 1" discharge line into toilet vent line in wall. But why?
Question: I have an existing gravity feed toilet. Can I replace/connect this on top of the standard floor sewer line my existing toilet is currently seated on
Answer: Take the one bolt you have to the hardware store, find a close match, buy two and throw away the original.
Question: We lost 1 anchor bolt. Mfr wont sell 1. Can you suggest acceptable bolt from hardware store
Answer: Thanks so much for contacting us. Yes, you can connect it into the same drainage line as long as that washer drain pipe drains into the main city sewer or septic tank (so it is standard black water waste). The only concern is if any other pipes are tied into that same drain pipe that may obstruct the air flow or may suck out the p-trap dry, then odor will come out that p-trap. If you have any other questions, please feel free to give us a call. We're happy to help! Sincerely - Support Team @ upflushTOILET.com (855) 70-FLUSH (855-703-5874)
Question: I do not have a sewage pipe I can attach the pipe to,can I use a standard drain used for a washing machine and general cleaning
Answer: The toilet hooks up to a floor drain and the release valve is in the bottom of the unit and is included. It has a "circulator" which brings water up and washes out the bowl. There is a screen inside that separates the solids out. We had an older model before this one and it worked for quite a while. You don't want to over-fill. There is a fill indicator right on the top. We flush it out each time with several buckets of water just to make sure it all goes out. The cleaner they recommend helps. We use the formaldehyde free type to preserve our septic system. There is no "vent kit". We usually empty ours every day or two and there is minimal odor.

Sun-Mar Compact Self-Contained Composting Toilet, Model# Compact

Sun-Mar Corp.

Based on 8 reviews Check latest price

Product description

WHY CHOOSE A SUN-MAR TOILET Sun-Mar toilets are the ultimate waste treatment solution Easily installed anywhere without the need for any plumbing connections, Sun-Mar toilets surpass traditional systems when it comes to protecting public health and the environment. When deciding which treatment solution is best for you it is very important to understand how various systems compare. Most waste treatment systems rely on bacteria to breakdown organic waste. This process is known as "composting". Whether the treatment system supports aerobic or anaerobic bacteria, it is extremely important to choose a system which fully composts waste to protect public health and safety. Quite often companies will use the term "composting" to describe their systems, although they do not "fully compost" waste. This is particularly true of urine separating toilets which merely collect waste or provide only partial treatment. These systems leave the homeowners with the daunting task of regularly having to dispose of raw solid and liquid waste. Fully composting waste is very important for public health & safety and the environment. This is why comprehensive evaluation and certification by NSF International, a Public Health and Safety Organization, is crucial. It ensures products perform as claimed and meet strict public health standards for design and performance. Although ANSI/NSF standard 41 has been around for over 25 years, Sun-Mar is one of only 2 companies certified and listed by NSF international. Many regulators require this certification.

User questions & answers

Question: Does this toiled need a composting agent
Answer: The urine goes into the main compartment with the compost material and feces. The heater at the bottom of the unit is suppose to evaporates the urine or drain out the provided drain to outside. So the urine drains down thru the composted material to the bottom tray ....as long as everything works perfectly. I have used this unit and a incenolet and a Airhead toilet and like the airhead the best. It separates the two and has never had an oder problem unless the power goes out.
Question: Where does the urine go
Answer: Also the amazon fee, more expensive to sell these products on larger outlets.
Question: Why does sun mar corp sell for $1785 online? And yours is
Answer: Depends on your needs. I have my bathtub and sick which drains into the toilet. If you ever want to add a third sink maybe 10, 20’ feet away you’ll be happy with the 3 access. Or if you want to install a bu’day with your sink and tube again yes I would do it. It’s coming up on 3 years since I put this system in and it’s great. Never had a problem. Rick

Thetford 92820 Porta Potti 365

Thetford

Based on 434 reviews Check latest price

Product description

The Thetford Porta Potti 365 is the original and best portable toilet! It features a refreshed, modern appearance and industry-leading performance with an exclusive rotating Pour-Out spout. The ergonomic carrying handle makes transporting the Porta Potti 365 easy. Fresh water capacity: 4.0 gallons. Waste water capacity: 5.5 gallons. Average flushes: 56. Dimensions: 16.3" Height x 15" Width x 16.8" Depth.

  • Refreshed, modern appearance
  • Industry-leading performance
  • Exclusive, rotating pour-out spout
  • More-ergonomic carrying handle
  • Standard lid latch

User questions & answers

Question: What is the best deodorizer etc. to use in this toilet that is safe for septic tanks
Answer: That question should probably be answered by those who specialize in septic fields. I would not rely on a layman’s opinion if the incorrect answer could cause thousands to repair your septic system. Or contact the deodorizer manufacturer for accurate information.
Question: Is this just for urine? I don’t see any info on emptying BM
Answer: It is for #2 also...just a little stingier emptying it.
Question: Is there a warranty? A piece fell out of the tank when we emptied it today
Answer: Yes!
Question: How many oz of toilet chemical is recommended for this toilet? The owner's manual does not address this
Answer: The stuff comes in 8 oz bottles. Use half for the waste tank with a little bit of water. FYI, I camped with this toilet in January for 7 days and only just got the red flag warning that the tank was getting fullish. That was me by myself, I hasten to add. YMMV. Pro tip: practice taking it apart and also make sure that the cap is on the waste tank pour spout. When I went to dump mine I discovered what I thought was an extra cap belonged there! Even so, absolutely no smell from this toilet and I was camping in a 6 x 12 enclosed cargo trailer.

Product features

The Original Portable Toilet

The Porta Potti separates, providing easy access to the holding tanks. With an improved water tank carrying handle and pivoting pour-out spout, easily empty and clean the Porta Potti tanks.

Eliminate the guesswork with built-in freshwater and wastewater tank level indicators.

Piston pump flush with an average of 56 flushes per fill.

Built For Comfort

The Porta Potti 365 has a sleek, modern design with a large bowl and comfortable seat height. With built in water level tank indicators, you can eliminate the guess-work of knowing how full your tank is.

50+ Flushes, 4 Gallon Fresh Water Tank & 5.5 Gallon Waste Water Tank

Entertaining a large crowd, or going on a long trip? The Porta Potti is designed for both personal and group use, With a 50+ flush capacity per single fill. You can spend less time with maintenance, and more time having fun.

Convenient Mess-Free Pour Out Spout

Emptying waste is clean and simple with Porta Potti. The air tight valve prevents leaks, while the rotating spout lets you drain contents without splashing or spillage.

Quick, Clean Detachment

The Porta Potti separates, providing easy access to the holding tanks. With an improved water tank carrying handle and pivoting pour-out spout, easily empty and clean the Porta Potti tanks

EAGO TB336 High Efficiency Eco-Friendly Toilet, 1-Piece

EAGO

Based on 5 reviews Check latest price

Product description

Living the Green Life. This environmentally friendly toilet will save a family of four an average of 10,000 gallons of water per year!.

From the Manufacturer

Living the Green Life. This environmentally friendly toilet will save a family of four an average of 10,000 gallons of water per year!.

  • Stylish High Efficiency Toilet featuring 1.28 GPF. It's about time
  • Soft Closing Toilet Seat and Lid Included
  • Powerful and efficient 3" flushing valve. Reduces the number of problems typically associated with older ball-chain-flapper systems
  • Wide water surface. A large surface area keeps odors down and allows for easy cleaning
  • Balanced water distribution. Designed to maintain the optimal balance between an increased diameter and proper exit velocity

User questions & answers

Question: Is there a weight limit for this toilet people in my family weigh up to 500 pounds
Answer: EAGO TB336 is flazed inside & out. Here are some of the features regarding flushing: 1. Powerful and efficient 3" flushing valve. Reduces the number of problems typically associated with older ball-chain-flapper systems.2. Wide water surface. A large surface area keeps odors down and allows for easy cleaning.3. Balanced water distribution. Designed to maintain the optimal balance between an increased diameter and proper exit velocity.4. Large 2" fully glazed trap. Fully glazing the trap way ensures that waste flows smoothly to the exit with a single flush each time.5. Big Jet Hole. This toilet also includes the wax ring for installation.
Question: Has the toilet ever lost suction power in waste removal? Has it clogged? Is it completely glazed inside? Thanks
Answer: Yes
Question: Is there a bidet for eago TB
Answer: I would return this if you have to move the hole- way too complicated and expensive.
Question: did anyone have to move the hole on the floor where the waste goes
Answer: I use one sometimes. It depends on how well it is working as far as composting....living in the north I did use it occasionally for extra help.

SereneLife Outdoor Portable Toilet with Carry Bag, Travel Toilet with Level indicator | | 3 Way Pistol Flush | Rotating Spout, for Camping, Boating, Traveling & Roadtripping

SereneLife

Based on 1 reviews Check latest price

Product description

Serene Life Model : SLCATL320Portable Outdoor Toilet System Portable Toilet - Outdoor And Travel Toilet, 5. 3 Gal. Features: Compact, Portable And Comfortable Easy Clean 3-Way Flush Nozzle Design Flushes and Rinses Bowl with Fresh Water Reserve Waste Water Tank Level Indication And VentNo External Water or Power Connections Require drugged And Durable Construction Corrosion-Resistant And Easy-to-Clean Button-Styled Pump Flusher Water Tank Capacity for Up to 50+ Flushes Easy Access Waste Tank for Quick Disposal Double-Sealed Drain Valve Protects Against Leaks And Odors A portable toilet has the unique ability to make your camping, boating or traveling experiences more enjoyable by providing a place for you to go whenever the urge strikes. This means you can stop digging holes and avoid long walks back to shared facilities when visiting campgrounds, camping on the beach or checking out popular tourist destinations! Since it is ultra lightweight, the Serene Life traveling toilet for adults can also be used as a portable toilet for boats, as a portable toilet for car rides or as an indoor portable toilet when you have guests or a broken stationary commode. An average bucket camping toilet gets the job done but this large portable toilet also reduces the mess when filling and emptying. This is because we have equipped it with an XL 5. 3 gallon tank, a splash-proof pouring spout and a layer of leak-free odor control protection. When you flush the commode, the 3 way nozzle also does a decent job of keeping the bowel clean. Unlike other travel toilet seats, this portable toilet with spout comes with its own carrying case. All you have to do is insert the components, cinch it up and you'll be all set to spend some time in the wilderness while still maintaining the modern comforts of home. Where will you go without worry? Don't wait to find out. Order your camping toilet today. Assembled Product Dimensions (L x W x H): 20.90 x 20.50 x 18.60 Inches

  • GO IN COMFORT ANYWHERE: Whether heading off for an unforgettable backwoods camping trip or traveling with the family, this portable toilet kit by Serene Life lets you go wherever and whenever nature calls!
  • #1 PORTABLE TRAVEL TOILET: Boating enthusiasts, frequent travelers And road tripping families turn to our compact traveling toilet seat because it can tag along without taking up too much room or weighing your down.
  • EXTRA LARGE TOILET TANK: The 5. 3 gallon toilet tank holds more than most other portable camping toilets, which means you'll have to empty it less often. And waste water tank level indication let you know when it's time!
  • EXTREMELY EASY TO EMPTY: We've rigged this portable camping toilet with a splash-free rotating pour spout, allowing you to quickly And discreetly empty it when full. The odor-resistant materials also make sure it doesn't retain smells!
  • CARRYING CASE INCLUDED: What kind of camping toilet chair doesn't come with a carrying case?! Our heavy duty portable toilet comes with a travel toilet bag that makes it super easy to tote around campsites.

User questions & answers

Question: Can these portable toilets be connected to the sewer pipe (black water hose) at campgrounds
Answer: No. The bottom portion that stores the waste water has to be deprecated and dumped.
Question: How much water is released when pump os operated
Answer: If I were to guess I'd say 1-2 cups, roughly 240-475 ml
Question: Is the center hole 8 x 9 like most others
Answer: You're correct. It's 9 in. front to back and 8 1/4 in. wide. You made me curious, so I measured my bathroom toilet. It's considered a long bowl and measures 10 in. front to back and the same 8 1/4 in. wide. Thank you for helping me learn something new. If I'm ever confronted by a mugger who says "tell me how big your toilet is or I'll blow your head off" I now know the answer. You may have saved my life!
Question: What happens after 50 flushes? Is there a battery and is it replaceable? Not enthusiastic about purchasing a new one every 50 flushes
Answer: There are two halves, top half has a cap to fill clean water and a plunger to push the clean water into the tank. The bottom half is for the waste which needs to be empty. There is an indicator in the front to let you know when it's due. I empty it about 3/4 full. I made the mistake once when the level was all red, DON'T DO THAT! 3/4 is best. To break down the waste, I use Walex Bio-Pak (for breaking down waste) and Porta-Pak (deodorizer), one each. I put them after setting it up and after each cleaning. It almost completely turns it into liquid. Fresh scent porta-pak seems to smell better (blue package) than lavender (purple package), however bio-back (green package) IS DEFINITELY NEEDED to break down waste. After the bottom tank gets full, (more like 40 flushes than fifty) it needs to be emptied, rinsed out with clean water and set back up. After its set up put in one bio-pak and one porta-pak. You can order through Amazon for those. The water tank, upper portion holds about 2.5 gallons (about 9.5 liters), I don't pull the plunger all the way up, only about half way or as needed. This way it conserves on water. Hope this helps.

Product features

Outdoor Portable Toilet with Carry Bag

SereneLife’s SLCATL320 portable toilet with carrying case is specially designed for outdoor or indoor activities, it is also a great emergency porta potty. Whether heading off for an unforgettable backwoods camping trip or traveling with the family, this portable toilet kit lets you go wherever and whenever nature calls. It has a capacity of 3.2 gallons of clean water and 50+ times of flushing. Also comes with a waste tank where waste is stored after flushing that has a capacity of 5.3 gallons. It’s also very accessible for quick disposal.

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