14 best rv black water tanks
RV black water tanks are an essential component of recreational vehicles (RVs) and motorhomes, responsible for collecting and storing wastewater from the toilet. Understanding these tanks and their maintenance is crucial for RV owners. Here's what you need to know about RV black water tanks:
Purpose: The primary purpose of an RV black water tank is to store human waste and toilet paper until it can be properly disposed of at a designated dumping station or sewer connection.
Location: RV black water tanks are typically located beneath the RV, usually towards the rear. They are connected to the RV's toilet through a waste pipe.
Capacity: The capacity of an RV's black water tank varies depending on the size and type of the RV. Smaller trailers may have tanks with capacities ranging from 5 to 15 gallons, while larger motorhomes can have tanks with capacities of 30 gallons or more.
Dumping: To empty the black water tank, RV owners need to visit a dump station specifically designed for this purpose. At the dump station, a sewer hose is connected to the RV's outlet, and the tank is emptied into a designated sewage receptacle.
Maintenance: Proper maintenance is essential to prevent odors and blockages in the black water tank. This includes using RV-specific toilet paper that breaks down easily, regularly adding tank treatment chemicals to control odors and facilitate waste breakdown, and flushing the tank thoroughly after each use.
Tank Sensors: Many RVs are equipped with tank level sensors that indicate how full the black water tank is. These sensors can sometimes become inaccurate due to buildup on their surfaces, so it's important to visually inspect the tank and not rely solely on sensor readings.
Dump Valve: The black water tank is equipped with a dump valve that allows you to control when and where the waste is released. This valve should be kept closed until you are ready to dump the tank.
Rinsing Systems: Some RVs are equipped with built-in tank rinsing systems, often called black tank flush systems. These systems use water to rinse the inside of the tank after dumping, helping to keep it clean and odor-free.
Dumping Etiquette: It's important to be courteous when using dump stations. Always follow posted rules, be patient if there is a line, and ensure that you completely empty your tank to avoid future issues.
Freezing Concerns: In cold weather, it's crucial to prevent the black water tank and associated plumbing from freezing. Use insulated hoses and heat tape as needed to protect the tank and pipes.
Understanding how to properly maintain and use an RV black water tank is essential for a comfortable and odor-free RVing experience.Regular care and responsible disposal practices are key to preventing issues and ensuring that your RV's sanitation system operates smoothly.
Below you can find our editor's choice of the best rv black water tanks on the marketProduct description
14 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-1400 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 40” Length (not including pipe) x 14.50” Width x 7.98” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 14 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-1400
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 40” Length (not including pipe) x 14.50” Width x 7.98” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | Does it have a predrilled hole in top center |
Answer: | No. It does not have predrilled holes. |
Question: | Does mounting braces come with it |
Answer: | No |
Question: | Why can't this be used for drinking water? Does it leach chemicals? Goes against code? Or some other reason |
Answer: | Class A Customs Black Water Hold Tanks are made from the recycled material (DOW NSF International NSF/ANSI Std 61 approved Medium Density Polyethylene (MDPE) Resin) that the fresh/gray tanks are made from, the recycled material is no longer pure in form and is not food grade approved. Class A Customs does not recommend using the black water tanks for drinking water. |
Question: | Does anyone know where I can get a cap for the end of the pipe? Its outside diameter is 3-7/8". I want to seal it off completely |
Answer: | With my experience, I'd say check with a plumbing supply house. I got fittings for my tank from a shop that works on RV's. |
Product description
27 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-2700 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 35” Length (not including pipe) x 17” Width x 10” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 27 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-2700
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 35” Length (not including pipe) x 17” Width x 10” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | Can you make a wt-2700 that is only 8" deep (27" x 35" x 8")? with less capacity of course |
Answer: | Class A Customs can make custom tanks however you would need to purchase a mold which can be rather costly, there may be other suppliers online with the dimensions you are needing. |
Question: | Is it equipped with a guage to let you know when it's full |
Answer: | No, this tank is not equipped with a gauge. You can use monitor probes and a monitor panel, KIB is an example, the sticky probes will not stick to this tank material so drilled probes are recommended. |
Question: | How you drain the thank |
Answer: | INLET & VENT INSTALLATION Customer will measure and determine where inlet/vent will be placed on Black Waste Tank. Use correct size hole saw bit in order to drill a hole in the tank and place rubber grommet in hole. Rubber grommet will secure inlet/vent pipe with no adhesives needed. DRAIN 3" PVC Fitting is installed on tank, connect plumbing pipe to tank and dump valve to end of plumbing pipe (dump valve typically does not connect directly to tank) helpful installation video can be found online https://www.youtube.com/watch?v=PQvtaBg0j_A&feature=youtu.be |
Question: | doe's this tank use solvent glue abs fittings |
Answer: | Class A Customs Black Water Hold Tanks are made from the recycled DOW NSF International NSF/ANSI Std 61 approved Medium Density Polyethylene (MDPE) Resin, being recycled the material becomes very hard typical spin weld fittings will not work on this material and glue does not adhere to this material. Grommets with no glue needed are used to install fittings into black water tanks, a helpful video on this can be found here - https://www.youtube.com/watch?v=PQvtaBg0j_A&feature=youtu.be |
Product description
40 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-4000 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 56.50” Length (not including pipe) x 24.50” Width x 9” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 40 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-4000
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 56.50” Length (not including pipe) x 24.50” Width x 9” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | Are there sensors on the tank |
Answer: | No |
Question: | How is it mounted to rv |
Answer: | It needs to use brackets(cross members) across your fram |
Question: | What is the measurement from the top of the tank to the lip |
Answer: | 9 1/2” |
Question: | This tank showes an imput hole in the top. How big is it I couldn't find anything in the discription |
Answer: | The top is a mold mark in the tank. In order to fill the tank you will need to use a hole saw bit and drill a hole into the tank where needed for your unit. Then place a plastic grommet to snug the pipe in, we also sell the grommets in 3" and 1 1/2". Thank you, Class A Customs Elkhart, Indiana |
Product description
48 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-4800 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 56” Length (not including pipe) x 30” Width x 9” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 48 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-4800
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 56” Length (not including pipe) x 30” Width x 9” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | what is the height at the narrow end |
Answer: | 6” |
Question: | What is the dimension from top of tank to ledge of ledge (not the bottom of tank |
Answer: | The Ledge or lip at the top is 3" long x 1" wide. |
Question: | Is there an outlet (hole) on the top? I cannot tell from pictures |
Answer: | No you have to drill out. |
Question: | What type of caulking or sealant is used at clamped transition fitting coming out of tank |
Answer: | just regular medium orange cpvc cement and works great |
Product description
ALPHA SYSTEM HOLDING TANK - Alpha's revolutionary blow molded holding tanks are the most reliable in the industry. The uniform thickness of the tanks makes them much more durable than the traditional rotational molded and thermoformed varieties. Alpha Systems blow-molded HDPE tanks are an integral component to all recreational vehicles. These RV holding tanks (waste water) have standard configurations with the option to customize fittings. Alpha Systems backs all of the tanks with a 12-month warranty from the date of purchase. Alpha tanks are built to standards specified by IAPMO (International Association of Plumbing and Mechanical Officials) and the Canadian Standards Association. 20677. 22 inch Width x 54 inch Length x 8 inch Height Holding Tank 33- Gallon, Blow-molded with 3 Inch Coupling; (A: 2.439. B:5.976. C:0.312. D:10.732. E:21.463. F:3.537. G:7.878. H:7.878. I: 3.804. J:56.805. K:54. L:21.463. M: 5.356).
- The uniform thickness of the tanks makes them much more durable than the traditional rotational molded and thermoformed varieties
- Alpha Systems blow-molded HDPE tanks are an integral component to all recreational vehicles
- Alpha Systems backs all of the tanks with a 12-month warranty from the date of purchase; Alpha tanks are built to standards specified by IAPMO (International
- Association of Plumbing and Mechanical Officials) and the Canadian Standards Association
- 22 Width x 54 Length x 8 Height Holding Tank 33 - Gallon, Blow-molded with 3 Inch Coupling
- The uniform thickness of the tanks makes them much more durable than the traditional rotational molded and thermoformed varieties
- Alpha Systems blow-molded HDPE tanks are an integral component to all recreational vehicles
User questions & answers
Question: | can this tank be used as a black tank or just grey water |
Answer: | This is a black water tank |
Question: | What do you recommend securing it with ? Steel straps ? The side is almost perfect also what size porting does it come with? If so wheres the location |
Answer: | In my application I am using steel straps with a rubber seal to prevent the strap from rubbing through the plastic. I'm not sure what you are referring to as far as porting, but it has a 3" outlet. Alpha systems does make a installation kit for their tanks. It includes a 3" grommet , 2 1/12 " grommets and extra sensors. This kit does not include straps or mounting hardware, though. Hope this helps! |
Question: | Is the tank drain on the right or left side of the deep end |
Answer: | Middle of the deep end. |
Question: | is it receeded |
Answer: | I'm not sure what you mean by receded. The top part laid flat. It had two ledges on both sides that you could use to strap it on. |
Product description
50 Gal Holding Tank
- Waste Water Supplies 50 Gal Holding Tank H-85 Custom Roto-Molding, Inc.
User questions & answers
Question: | How many gallons will this tank hold |
Answer: | the one i purchased was rated for 50 gallons |
Question: | Could you put this tank on a cement pad for above ground septic |
Answer: | I don't see why not, we just put it on a pallet in the back of it pickup. We're using it as a portable for our RV since the Portable we bought broke. This one is a lot more sturdy. |
Question: | what type of plastic is it |
Answer: | Looks like a black ABS type |
Question: | Is this safe/can this be used for potable/fresh water applications? The dimentions are perfect for my needs and I haven't found a good fresh tank |
Answer: | I would ask your he as lth d we put. I think they are ed CV plot codes for health safety reasons I do t know if the type of plastic can be used for potbke or not. Sorry.... |
Product description
This tank has reinforcements built right in so you can mount a toilet directly on top of it. The holding tank comes with a 3" Threaded Fitting, a 2" Slip Fitting and a 3"ID/7"OD Flange Fitting. No additional fittings are needed. All seams are solvent welded and have a 1-1/4" mounting flange.
- Built-in reinforcements for mounting a toilet
- Includes: 3" Threaded Fitting, a 2" Slip Fitting and a 3"ID/7"OD Flange Fitting
- No additional fittings are needed
- Features a bottom drain and an 8 gallon holding capacity
- Dimensions: 22.5" x 18.5" x 6"
User questions & answers
Question: | Did have the location measurement of the hole in the bottom |
Answer: | The hole is in the exact center measuring from front to back, and from side to side. It is also threaded. |
Question: | how many gallons |
Answer: | 10 gallon |
Question: | How many gallons |
Answer: | Comparing to others close to same size I believe it is 8 gallons. |
Question: | How many gallons? can we can an accurate amount not a guess |
Answer: | we bought one and it holds 10 gallons |
Product description
31 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-3100 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 57.50” Length (not including pipe) x 24.50” Width x 8” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 31 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-3100
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 47.50” Length (not including pipe) x 24.50” Width x 8” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | Instructions say dont use straps, can you mount it just by the flange and is that strong enough to support it |
Answer: | This same style tank is mounted under a forest river R-Pod camper at my local dealer. It has z-channel brackets that span between frame rails holding up the shoulders of the tank. I called the dealer and they are able to order the brackets from the manufacturer for $38 each. I had my father in law weld me two that match before the dealer got back to me. Still working on painting and mounting them. |
Question: | Is it FDA approved |
Answer: | This is a discharge tank. |
Question: | Does anyone know where I can get a cap for the end of the pipe? Its outside diameter is 3-7/8". I want to seal it off completely |
Answer: | Any hardware store. Lowes, Home Depot, Ace, etc. |
Question: | There are two different lengths shown in the listing, one says 47.50" and another says 57.50". Which is it |
Answer: | Tank is 47.5" long. The outlet pipe adds another 4.25" |
Product description
30 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-3000 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 55.75” Length (not including pipe) x 23.75” Width x 8” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 30 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-3000
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 55.75” Length (not including pipe) x 23.75” Width x 8” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | What is the height at the shallow end |
Answer: | Don’t but they ship broke products then have you pay for shipping back that costs 80% of what you paid for the product |
Question: | What is the best place to install the fill sensors? The top section sticks out so should the top sensor and maybe middle sensor be on that |
Answer: | We didn’t install any sensors. It was installed on a pontoon boat |
Question: | How does tank attach to rv if straps arent to be used |
Answer: | I used unistrut welded to bottom of bus, all thread and old bed frame to mount it |
Question: | is there two outlets |
Answer: | No inlets on tank - Inlet Installation: Customer will measure and determine where inlet will be placed on Black Waste Tank. Use correct size hole saw bit in order to drill a hole in the tank and place grommet in hole. Grommet will secure inlet pipe with no adhesives needed. |
Product description
38 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-3800 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 56” Length (not including pipe) x 24.25” Width x 8.90” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 38 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-3800
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 56” Length (not including pipe) x 24.25” Width x 8.90” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | Do these tanks have the level sensors pre-installed before delivery |
Answer: | There were no sensors included with this tank |
Question: | is there a vent on this tank |
Answer: | Inlet & Vent Installation Customer will measure and determine where inlet / vent will be placed on Black Waste Tank. Use correct size hole saw bit in order to drill a hole in the tank and place grommet in hole. Grommet will secure inlet / vent pipe with no adhesives needed. |
Question: | Is the 3” outlet pvc or abs |
Answer: | It is a black plastic tank with a 3" outlet. There is an ABS fitting that has an "O" ring part way up the portion that slides into the female outlet of the tank. It is also clamped by a hose clamp. The other end of the fitting will receive 3" ABS pipe. |
Product description
Color: Black Capacity: 45 gallons Durable high-density plastic walls Low-profile Front-facing port Length: 54” Width: 32” Depth: 7” Front lip depth: 3” Port: 4” OD and 3.75” ID Multiple depth sensors
- Capacity: 45 gallons
- Durable high-density plastic walls
- Low-profile
- Front-facing port
Product description
24 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-2400 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 42.50” Length (not including pipe) x 23” Width x 9.25” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 24 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-2400
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 42.50” Length (not including pipe) x 23” Width x 9.25” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | Can ypu recommend metal straps that I could buy to bolt/mount this tank under a conversion bus |
Answer: | I used mobile home tie down from Lowe’s. It is heavy gauge galvanized strapping 1-1/4” sold in 25 ‘ length with no holes. I used three straps, and added foam camper weather stripping also from Lowe’s good luck |
Question: | How do i mount it |
Answer: | Side flanges |
Question: | Does this tank have a hole for the vent |
Answer: | No, it only has the dump fitting installed. Customer will need to determine where entry hole will be and use a hole saw to cut the tank and then install rubber grommet. For an example you can watch a helpful video online at https://youtu.be/miKZMpbCBgc |
Question: | Does it come with a hole already in it for the toilet to hook up or just the drain fitting |
Answer: | This comes with just the drain fitting allowing you to decide the placement of the toilet hook-up location on the tank. |
Product description
28 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-2800 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 46” Length (not including pipe) x 22” Width x 8.5” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 28 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-2800
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 46” Length (not including pipe) x 22” Width x 8.5” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | Does anyone know where I can get a cap for the end of the pipe? Its outside diameter is 3-7/8". I want to seal it off completely |
Answer: | The easiest way would be to glue in a short piece of 3 inch ABS pipe and then glue a 3 inch cap on the pipe. Or if you want a drain, glue a slide shutoff on the pipe. You could also message them directly and they would probably send you a tank without the drain hole. |
Question: | can this be permanently installed in the ground |
Answer: | I would have to know why. Are you using it as a septic tank? If so there are better options. |
Question: | how does this tank mount? Cant a bracket be made to hold it up by the top edge / lip that runs the length of the tank |
Answer: | I did by welding 2 pieces of 1 1/2 inch angle iron together to make a zee. But I have a welder. A welding shop could make you one very easily. |
Question: | I dont see a hole in the top coming from the rv |
Answer: | Customer will measure and determine where inlet/vent will be placed on Black Waste Tank. Use correct size hole saw bit in order to drill a hole in the tank and place rubber grommet in hole. Rubber grommet will secure inlet/vent pipe with no adhesives needed. This is a helpful installation video online https://www.youtube.com/watch?v=PQvtaBg0j_A&feature=youtu.be |
Product description
18.5 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-18.50 Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER MADE WITH Medium Density Polyethylene (MDPE) Resin SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant TANK MEASUREMENTS 34” Length (not including pipe) x 16.50” Width x 11” Depth at largest point INSTALLATION & PLUMBING 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur MOUNTING & BRACING Brace to prevent tank from moving during transit Do not hang tank by straps Do not place weight on tank
- 18.5 Gallon Black / Waste Water Holding Tank Manufactured by Class A Customs Part# WT-1850
- Black Water Tank Used for Human Waste or Gray Water - DO NOT USE FOR FRESH/DRINKING WATER
- MADE WITH Medium Density Polyethylene (MDPE) Resin
- SEAMLESS One piece seamless construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant
- TANK MEASUREMENTS 34” Length (not including pipe) x 16.50” Width x 11” Depth at largest point - 3” PVC Female Pipe Adapter DO NOT over-tighten fittings damage will occur
User questions & answers
Question: | How far does the drain pipe stick out |
Answer: | About 3 or 4 inches, I think. |
Question: | Does this mount under the vehicle |
Answer: | Yes it mounts under the vehicle. It has a lip about 2 to 3 inches from the top that you can make a bracket to grip into. Worked great for me. Make sure to put your inlet in the correct location and save the bushing from the old tank to install in this hole. I also installed the liquid level indicators by reaching through the outlet hole. You may need to find someone with a small hand and arm to help with this. Take your time and measure several times before you drill the holes. |
Question: | what is the top fill inlet size |
Answer: | With this tank the customer would need to cut the hole, either 3" or 1 1/2" in location needed, then use a grommet to secure inlet pipe. For more information you can check out our blog post. https://classacustoms.blogspot.com/2019/03/rv-waste-water-holding-tank-black-rv.html |
Question: | Does this tank have water level sensors preinstalled |
Answer: | No, it does not have pre-installed water level sensors. |
Latest Reviews
View all
Laser Measuring Tools
- Updated: 21.06.2023
- Read reviews

Casio G Shock Solar Watches
- Updated: 07.02.2023
- Read reviews

5 Vegetables
- Updated: 11.05.2023
- Read reviews

Electronics 4 People Fans
- Updated: 10.01.2023
- Read reviews

Heavy Cleavers
- Updated: 26.06.2023
- Read reviews