Travel Trailer Grey Water Tanks of 2025
Best Choice1
Ameri-KartAmeri-Kart HT-293 Side Discharge 32 Gallon RV Gray Water Holding Tank for Campers, Trailers, and RVs, 63-Inch x 24-Inch x 7.25-Inch
Main highlights- USA MADE - Proudly manufactured by Ameri-Kart in Elkhart, Indiana - the RV Capital of the World
- NOT INCLUDED - inlet and vent fittings, hardware, mounting hardware, dump/gate valves, piping
- EASY TO INSTALL - gray water holding tanks are a critical component to all recreational vehicles - Includes 1.5" OUTLET - Inlet and vent locations determined by user during installation - hardware not included - TANK MUST BE VENTED when in use - DO NOT PRESSURIZE TANK
- DURABLE & RELIABLE - OEM quality tank made from weather resistant and impact-resistant plastics. RV Holding Tank design prevents leaks and ensures long service life. Built to standards specified by IAPMO (International Association of Plumbing and Mechanical Officials). All gray water tanks are QAI Laboraties certified to meet industry-required standards
- 32 GALLON TANK - RV gray water holding tank MADE IN THE USA - Gray water only - NOT FOR WASTE OR FRESH OR DRINKING WATER USE - Perfect for motorhomes, trailers, tiny houses, RVs and campers
9.9Exceptional
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Value for Money2
RecProRecPro RV 45 Gallon Fresh Water Holding Tank for Campers, Trailers and RV Tank with Sensors | Made in America
9.3 lasts a long time8.2 worth the money8.2 DurabilityWhy we love it
Durable and long-lasting build quality.
Perfect fit for most recreational vehicles.
Meets high safety and quality standards.
9.7Exceptional
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3
classAcustomsClass A Customs 40 Gallon RV Waste Black Water Holding Tank WT-4000
Main highlights- NOT INCLUDED Inlet and Vent Fittings / Additional Fittings / Hardware / Mounting Hardware / Dump Valve / Piping NOT INCLUDED
- INSTALLED OUTLET 3” ABS Female Pipe - outlet can not be moved DO NOT over-tighten fittings damage will occur Dump valves do not hook directly to the 3" ABS fitting, from the outlet run PVC or ABS piping (not included), dump valve (not included) is added to the piping.
- INLET & VENT INSTALLATION Class A Customs Black Water Tanks only come with the outlet the end user will determine where the inlet and vent will need to be placed and install, hardware NOT included. TANK MUST BE VENTED allowing air in and out when in use. *DO NOT PRESSURIZE TANK* DO NOT over-tighten fittings damage will occur.
- 40 Gallon RV Waste Water Holding Tank MADE IN THE USA by Class A Customs using Medium Density Polyethylene (MDPE) Resin TANK NOT FOR FRESH OR DRINKING WATER USE – WASTE/GRAY WATER USE ONLY – Used in RV’s Campers, Trailers, Motorhomes and Tiny Houses
9.4Excellent
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4
classAcustomsClass A Customs | T-4000 | One (1) RV Fresh Water 40 Gallon Tank, Grey Water
Main highlights- WATER TANK MEASUREMENTS: 39 1/2” Longest Length (not including fittings) x 13” x 18” - Tank can sit on any side - rotate tank to change height or width Average Thickness 7/32” +/- Please view photos. (Due to the manufacturing process +/- .25" on each measurement)
- TANK BUILT-IN FITTINGS: (TWO) 1.5" Female NPT Fitting - fitting is sealed and watertight, to use remove membrane with razor knife (TWO) .5" Female NPT Fitting - fitting is open DO NOT over-tighten fitting damage will occur, use plastic connecting fittings as metal will damage threads.
- NON-PRESSURIZED TANK: tank must be vented allowing air in and out during use. DO NOT make a sealed connection with a garden hose directly to tank, this is a pressurized connection and will cause tank to explode causing damage. For filling tank it is recommended to use a fill dish or other gravity process.
- Great extra water storage in RV, pop-up camper, off-road vehicles, concession trailers, hot dog carts, smaller food vendors and portable hand washing sinks. Class A Customs Manufactures this item in the USA in Elkhart, Indiana. Tanks are made in a warehouse clean each tank prior to use to remove any debris, scuffs or marking from the manufacturing process.
- 40 Gallon Fresh or Gray Water Holding Tank Manufactured by Class A Customs - Made from NSF Approved Materials - Fresh & Drinking Water Safe - Can be used for Fresh or Gray Water Storage
9.1Excellent
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5
classAcustomsClass A Customs | RV Fresh and Gray Water Tank | Combo Pack (30 Gallon & 40 Gallon) | RV Water Holding Tanks
Main highlights- NON-PRESSURIZED TANK: tank must be vented allowing air in and out during use. DO NOT make a sealed connection with a garden hose directly to tank, this is a pressurized connection and will cause tank to explode causing damage. For filling tank it is recommended to use a fill dish or other gravity process.
- Combo Pack (ONE) 30 Gallon & (ONE) 40 Gallon Fresh or Gray Water Holding Tank Manufactured by Class A Customs - Made from NSF Approved Materials - Fresh & Drinking Water Safe - Can be used for Fresh or Gray Water Storage
- 40 GALLON TANK MEASUREMENTS 39.5” x 13” x 18” -Tank can sit on any side - rotate tank to change height or width Average Thickness 7/32” +/- Please view photos. (Due to the manufacturing process +/- .25" on each measurement)
- 30 and 40 GALLON EACH TANK BUILT-IN FITTINGS: (TWO) 1.5" Female NPT Fitting - fitting is sealed and watertight, to use remove membrane with razor knife (TWO) .5" Female NPT Fitting - fitting is open DO NOT over-tighten fitting damage will occur, use plastic connecting fittings as metal will damage threads.
- 30 GALLON TANK MEASUREMENTS 34.5” x 12” x 17.5” -Tank can sit on any side - rotate tank to change height or width Average Thickness 7/32” +/- Please view photos. (Due to the manufacturing process +/- .25" on each measurement)
8.9Very Good
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6
classAcustomsClass A Customs | T-4600 | One (1) RV Fresh Water 46 Gallon Tank, Grey Water
Main highlights- WATER TANK MEASUREMENTS: 42” Longest Length (not including fittings) x 14” x 18” - Tank can sit on any side - rotate tank to change height or width Average Thickness 7/32” +/- Please view photos. (Due to the manufacturing process +/- .25" on each measurement)
- TANK BUILT-IN FITTINGS: (TWO) 1.5" Female NPT Fitting - fitting is sealed and watertight, to use remove membrane with razor knife (TWO) .5" Female NPT Fitting - fitting is open DO NOT over-tighten fitting damage will occur, use plastic connecting fittings as metal will damage threads.
- NON-PRESSURIZED TANK: tank must be vented allowing air in and out during use. DO NOT make a sealed connection with a garden hose directly to tank, this is a pressurized connection and will cause tank to explode causing damage. For filling tank it is recommended to use a fill dish or other gravity process.
- Great extra water storage in RV, pop-up camper, off-road vehicles, concession trailers, hot dog carts, smaller food vendors and portable hand washing sinks. Class A Customs Manufactures this item in the USA in Elkhart, Indiana. Tanks are made in a warehouse clean each tank prior to use to remove any debris, scuffs or marking from the manufacturing process.
- 46 Gallon Fresh or Gray Water Holding Tank Manufactured by Class A Customs - Made from NSF Approved Materials - Fresh & Drinking Water Safe - Can be used for Fresh or Gray Water Storage
8.7Very Good
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7
A.AA.A 42 Gallon RV Fresh/Gray Water Tank 39" x 18" x 14" - BPA Free (42 Gallon)
Main highlights- This 42 gallon water tank measures 39" x 18" x 14" (not including fittings)
- These rotational molded fresh water tanks are made from a high quality durable polyethylene material.
- Stain, corrosion and rust resistant features make them ideal for replacement or OEM installation on RVs, horse trailers or marine products.
- One piece seamless construction - No Seams to burst
- All tanks come with (1) 1.25" water fill inlet and (3) 3/8" NPT connections. Non-Pressurized Tank - The tank must be vented
8.5Good
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8
classAcustomsClass A Customs | RV Fresh and Gray Water Tank | Combo Pack (16 Gallon & 21 Gallon) | RV Water Holding Tanks
Main highlights- These 16 and 21 gallon tanks each have two 1/2" female NPT fittings (fitting will be closed, to use remove inner membrane with razor knife) and two 1 1/2" female NPT fittings (fitting is not closed, this fitting is completely open)
- NSF Certified MATERIALS used for manufacturing process -- ALL PARTS of tank made with NSF International NSF/ANSI Std 61 approved Medium Density Polyethylene (MDPE) Resin with UV-8 stabilization -- The tank and fittings are both made out of this material.
- Combo Pack of RV Fresh & Gray Water Tanks, 16 Gallon & 21 Gallon
- 21 Gallon Tank measurements - 34" x 9" x 16" (+/- .25")
- 16 Gallon Tank measurements - 25.25" x 17.25" x 10.5" (+/- .25")
8.3Good
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9
RecProRecPro Fresh and Gray Water Holding Tank | Combo Pack | Concession/Food Truck Holding Tank (10 & 16 Gallon)
Main highlights- Please be sure to clean tanks before use
- Made in America
- All tanks have been pressure tested
8.2Good
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10
classAcustomsClass A Customs | RV Fresh and Gray Water Tank | Combo Pack (10 Gallon & 13 Gallon) | RV Water Holding Tanks
Main highlights- TANKS BUILT-IN FITTINGS:(TWO) 1.5" Balloon Style Threaded Female NPT Standard - fitting will be closed, to use remove inner membrane with razor knife (TWO) .5" Threaded Female NPT Standard - open fitting, unsealed
- NON-PRESSURIZED TANK: tank must be vented allowing air in and out during use. DO NOT hook garden hose directly to tank doing so will cause tank to explode resulting in damage.
- Combo Pack 10 Gallon & 13 Gallon Fresh or Gray Water Holding Tank Manufactured by Class A Customs - BPA FREE - NSF FDA Approved Materials - Fresh & Drinking Water Safe - Can be used for Gray Water Storage
- 13 Gallon Tank measurements - 21" Longest Length (not including fittings) x 16" x 9" (rotate tank to change height or width) Average thickness 7/32” +/- (+/- .25" on each measurement)
- 10 Gallon Tank measurements - 18 3/4" Longest Length (not including fittings) x 13 3/4" x 8 3/4" (rotate tank to change height or width) Average thickness 7/32” +/- (+/- .25" on each measurement)
7.9Good
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