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The Best Rv Gray Water Tank of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Rv Gray Water Tank of 2022. Check our ranking below.

2,697 (random) Reviews Scanned

Rank No. #1
Class A Customs | RV Fresh and Gray Water Tank | Combo Pack (13 Gallon & 16 Gallon) | RV Water Holding Tanks
  • Combo Pack of RV Fresh & Gray Water Tanks, 13 Gallon & 16 Gallon
  • 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.
  • The 13 and 16 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)
  • 13 Gallon Tank measurements - 21" x 16" x 9" (+/- .25")
  • 16 Gallon Tank measurements - 25 1/4" x 17 1/4" x 10 1/2" (+/- .25")
Rank No. #2
Class A Customs | RV Fresh and Gray Water Tank | Combo Pack (21 Gallon & 25 Gallon) | RV Water Holding Tanks
  • Combo Pack of RV Fresh & Gray Water Tanks, 21 Gallon & 25 Gallon
  • 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.
  • These 21 and 25 gallontanks 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)
  • 21 Gallon Tank measurements - 34" x 9" x 16" (+/- .25")
  • 25 Gallon Tank measurements - 33 1/2" x 17" x 10" (+/- .25")
Rank No. #3
Class A Customs | RV Fresh and Gray Water Tank | Combo Pack (40 Gallon & 55 Gallon) | RV Water Holding Tanks
  • Combo Pack of RV Fresh & Gray Water Tanks, 40 Gallon & 55 Gallon
  • 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.
  • These 40 gallon and 55 gallon tanks each have two 1 1/2" female NPT fittings (fitting will be closed, to use remove inner membrane with razor knife) and two 1/2" female NPT fittings (fitting is not closed, this fitting is completely open)
  • 40 Gallon Tank Measurements - 39 1/2" x 18" x 13" (+/- .25")
  • 55 Gallon Tank Measurements - 37 1/2" x 19 1/2" x 17 1/2" (+/- .25")
Rank No. #4
Class A Customs | UM-1500 | One (1) UnderMount 15 Gallon RV Fresh and Gray Water Holding Tank RV Concession
  • 15 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
  • WATER TANK MEASUREMENTS: 36” Longest Length (not including fittings) x 8.5” height x 13” width - 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 water-tight, 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 threaded fittings, metal threads may damage tank fittings
  • 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.
Rank No. #5
Class A Customs | RV Fresh and Gray Water Tank | Combo Pack (7 Gallon & 10 Gallon) | RV Water Holding Tanks
  • Combo Pack of RV Fresh & Gray Water Tanks, 7 Gallon & 10 Gallon
  • 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.
  • The 7 Gallon tank has three 1/2" female NPT fittings and one 1 1/2" female NPT fitting and the 10 Gallon tank has two 1/2" female NPT fittings and two 1 1/2" female NPT fittings. Please note - the 11/2" female NPT fittings have a membrane sealing them closed, this membrane must be cut out by the end user for the fittings to be used. The 1/2" fitting is open, *WITHOUT* any membrane sealing it closed.
  • 7 Gallon Tank measurements - 23 3/4" x 9 3/4" x 7"
  • 10 Gallon Tank measurements - 18 3/4" x 13 3/4" x 8 3/4" (+/- .25")
Rank No. #6
Class A Customs | RV Fresh and Gray Water Tank | Combo Pack (20 Gallon & 23 Gallon) | RV Water Holding Tanks
  • Comob Pack (ONE) 20 Gallon & (ONE) 23 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
  • 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.
  • 20 and 23 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.
  • 20 GALLON TANK MEASUREMENTS 32 1/2" x 11 3/4" x 11 3/4" - 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)
  • 23 GALLON TANK MEASUREMENTS 39 1/2" x 14 3/4" x 8 3/4" (+/- .25")" - 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)
Rank No. #7
Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000
  • 30 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
  • WATER TANK MEASUREMENTS: 48” Longest Length (not including fittings) x 8.5” x 20.5” - 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)
  • TANK BUILT-IN FITTINGS: (TWO) 1.5" Female NPT Fitting - fitting is sealed and water-tight, 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 threaded fittings, metal threads may damage tank fittings
  • 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.
Rank No. #8
A.A 16 Gallon RV Fresh/Gray Water Tank 24" x 15" x 10" BPA Free (16 Gallon)
  • This 16 gallon water tank measures 24" x 15" x 10" (not including fittings)
  • These rotational molded fresh water tanks are made from a high quality durable polyethylene material.
  • 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
  • Stain, corrosion and rust resistant features make them ideal for replacement or OEM installation on RVs, horse trailers or marine products.
Rank No. #9
Class A Customs | UM-2000 | One (1) UnderMount 20 Gallon RV Fresh and Gray Water Holding Tank RV Concession
  • 20 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
  • WATER TANK MEASUREMENTS: 48” Longest Length (not including fittings) x 8.5” height x 13” width - 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 water-tight, 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 threaded fittings, metal threads may damage tank fittings
  • 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.
Rank No. #10
Class A Customs | T-1000 | One (1) RV Fresh Water 10 Gallon Tank, Grey Water
  • 10 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
  • WATER TANK MEASUREMENTS: 19” Longest Length (not including fittings) x 9” x 14” - 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.

Last update on 2022-12-29 / Affiliate links / Images from Amazon Product Advertising API

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