Best Water Tanks For Rvs: Compare 7 Freshwater Options

#1 · Best Overall

1. classAcustoms T3500-TO

• Dimensions: 12"L x 17.25"W x 38.5"H
• Capacity: 35 gallons
• Material: Polyethylene (PE)

Best for: Potable-water retrofit tank.

Why it ranks #1: Its 35-gallon capacity, NSF-certified food-grade materials, and explicit potable-water uses make it a well-documented fit for RV freshwater storage.

NSF-certified food-contact materials make the classAcustoms T3500-TO a practical choice for storing water intended for drinking, cooking, showering, and dishwashing. Its 35-gallon capacity suits RV owners who need a dedicated freshwater reserve, while multiple fitting locations allow options when planning an installation in a camper, trailer, motorhome, or tiny house.

The 12-by-17.25-by-38.5-inch polyethylene tank has a tall, narrow footprint that may suit storage spaces where width is limited, though its height needs allowance. Multiple fitting locations offer installation options, and the NSF-certified material and fittings support the stated potable-water use. At 14.5 pounds, the tank itself is manageable to position before filling. It is supplied as one tank, so the buyer should plan the rest of the water-system hardware separately.

Skip it if you need more than 35 gallons; the RecPro T6500 holds 65 gallons for a larger freshwater reserve.

Choose this classAcustoms tank for a potable-water setup needing 35 gallons and flexible fitting placement. Its tall 38.5-inch profile is the key fit consideration, and the package is one tank rather than a complete plumbing system.

Listed on Amazon as: T3500-TO RV Fresh Water Tank, Potable Water Storage Tank for Drinking, Cooking, Cleaning, Showering, for Campers, Trailers, Motorhomes, RVs, Concession (Tank Only, 35 Gallon)

#2 · Largest Capacity

2. Ameri-Kart WT-5553

• Dimensions: 43 x 25 x 13 in

Best for: High-capacity cube tank.

Why it ranks #2: The listing describes a 57-gallon potable-water tank made from BPA-free materials, with a cube-shaped 43 by 25 by 13-inch format.

A 57-gallon capacity gives the Ameri-Kart WT-5553 a substantial freshwater reserve for RV owners who want less frequent replenishment between fill-ups. Its cube-shaped 43-by-25-by-13-inch form combines that storage volume with built-in threaded fitting locations, and the BPA-free materials are specified for potable water used in drinking, cooking, showering, and washing dishes.

The 43-by-25-by-13-inch dimensions give buyers concrete measurements to compare with a planned RV storage bay before installation. Ameri-Kart lists multiple fitting locations, including two 1.5-inch balloon-style threaded female NPT fittings and two 0.5-inch threaded female fittings; these provide connection points for configuring the installation. BPA-free construction and stated potable-water use support freshwater storage, while the 57-gallon capacity extends the reserve. At 24.7 pounds, it also has a listed empty weight for handling plans.

Skip it if you have a narrow bay; the Ameri-Kart WT-5549 measures 37 by 16 by 15 inches.

The WT-5553 suits RV owners prioritizing a large potable-water reserve and who can accommodate its 43-by-25-inch footprint. Compare those dimensions with the intended bay and plan around its listed threaded fittings before choosing an installation location.

Listed on Amazon as: 57 Gallon RV Fresh Water Tank, Potable Water Storage Tank for Drinking, Cooking, Cleaning, Showering, for Campers, Trailers, Motorhomes, RVs, Cube Shape, 43" x 25" x 13" (WT-5553)

#3 · Highest Capacity

3. RecPro T6500

• Dimensions: 44.5"L x 19"W x 17.25"H
• Capacity: 65 gallons
• Material: Polyethylene (PE)

Best for: Compact 65-gallon reserve.

Why it ranks #3: Its 65-gallon polyethylene capacity is the largest listed, and the 44.5 by 19 by 17.25-inch dimensions are provided for fit planning.

RecPro packs 65 gallons into a tank measuring 44.5 by 19 by 17.25 inches, giving RV owners a large freshwater reserve with a comparatively narrow listed width. The BPA-free polyethylene construction is specified for freshwater storage, and the stated compact dimensions help buyers assess whether the capacity can fit against a wall or in a tight storage area.

The 65-gallon capacity can extend the time between freshwater refills, while the 19-inch width and 17.25-inch height provide useful measurements for checking a constrained installation bay. RecPro describes the tank as compact enough to store snugly against walls, making its long 44.5-inch dimension important to measure in advance. BPA-free polyethylene supports the stated freshwater role, and the listed 30-pound weight gives installers a handling figure before the tank is filled.

Skip it if you need a shorter tank; the TORVA RV-WT115 measures 34 inches long and holds 30 gallons.

Pick the RecPro T6500 when capacity is the priority and a 44.5-inch length fits the RV’s storage area. Its 65-gallon size and BPA-free polyethylene suit freshwater storage, but confirm that the bay can accommodate its full dimensions.

Listed on Amazon as: RecPro 65 Gallon RV Fresh Water Holding Tank

#4 · Compact Capacity

4. Ameri-Kart WT-5549

• Dimensions: 37 x 16 x 15 in

Best for: Mid-size potable-water tank.

Why it ranks #4: This 36-gallon potable-water tank uses BPA-free materials and measures 37 by 16 by 15 inches, offering a specified midrange footprint.

The Ameri-Kart WT-5549 offers a 36-gallon potable-water capacity in a 37-by-16-by-15-inch cube shape, giving RV owners a middle ground between smaller tanks and larger reserves. BPA-free materials and listed fitting locations support drinking, cooking, showering, and dishwashing applications, while the specified dimensions help buyers judge whether the tank can fit their planned storage space.

At 37 inches long, 16 inches wide, and 15 inches high, the WT-5549 gives installers clear measurements for checking a storage bay before positioning it. Ameri-Kart lists multiple fitting locations, including two 1.5-inch balloon-style threaded female NPT fittings and two 0.5-inch threaded female fittings, offering connection points for installation planning. The 36-gallon capacity is sized between the 30- and 57-gallon options in the product set, and BPA-free construction supports its stated potable-water use.

Skip it if you need more reserve capacity; the Ameri-Kart WT-5553 holds 57 gallons and uses BPA-free materials.

Choose the WT-5549 for a mid-size potable-water tank when its 37-by-16-by-15-inch dimensions suit the RV bay. Its listed threaded fittings help with installation planning, but the 36-gallon reserve is not the largest option.

Listed on Amazon as: 36 Gallon RV Fresh Water Tank, Potable Water Storage Tank for Drinking, Cooking, Cleaning, Showering, for Campers, Trailers, Motorhomes, RVs, Cube Shape, 37" x 16" x 15" (WT-5549)

#5

5. TORVA RV-WT115

• Dimensions: 34"L x 16.5"W x 16.5"H
• Capacity: 30 gallons
• Material: Linear Low-Density Polyethylene

Best for: Valve-included 30-gallon tank.

Why it ranks #5: The 30-gallon tank is listed for drinking, cooking, cleaning, and showering, and includes a valve; its listed material is linear low-density polyethylene.

An included valve distinguishes the TORVA RV-WT115 from listings that specify only a tank, giving RV owners one listed component for a 30-gallon freshwater setup. The BPA-free product title identifies drinking, cooking, cleaning, and showering as intended uses. Its 34-by-16.5-by-16.5-inch dimensions provide a clear starting point for checking an RV storage location.

The 30-gallon capacity suits buyers who need a moderate freshwater reserve, while the 34-inch length and 16.5-inch width and height help establish whether the tank fits the planned space. TORVA lists linear low-density polyethylene as the material and includes a valve with the tank, which gives the package a stated water-control component. The title describes it as BPA-free and intended for potable uses, so those details support freshwater rather than wastewater planning.

Skip it if you need more than 30 gallons; the Ameri-Kart WT-5549 holds 36 gallons and lists BPA-free materials.

The TORVA suits RV owners seeking a 30-gallon potable-water tank with a valve included. Use its listed dimensions to check the installation space, and choose a larger-capacity option if 30 gallons does not provide enough reserve.

Listed on Amazon as: TORVA 30 Gallon Fresh Water Tank, BPA Free Water Tank for Drinking, Cooking, Cleaning, Showering, Portable Water Storage for Campers, Trailers, Motorhomes, RVs (34'' x 13'' x 16.5'')

#6 · Multiple Connections

6. A.A FWT-RV

• Dimensions: 34"L x 12"W x 18"H
• Capacity: 30 gallons
• Material: Polyethylene (PE)

Best for: Vented replacement tank.

Why it ranks #6: This 30-gallon fresh/gray-water tank has one 1.25-inch fill inlet and three 3/8-inch NPT connections, but requires venting.

A one-piece seamless body is the defining feature of this A.A 30-gallon tank, with no seams to burst according to its product details. Its 34-by-18-by-12-inch dimensions and included fill inlet and NPT connections give RV owners concrete measurements and connection points when planning a fresh- or gray-water replacement.

The 30-gallon polyethylene tank has a 34-by-18-by-12-inch body, not including fittings, so installers need to allow for the connections beyond those measurements. One 1.25-inch water-fill inlet and three 3/8-inch NPT connections support plumbing layout planning. Its seamless rotational-molded construction is specified as stain-, corrosion-, and rust-resistant, relevant for a tank used in an RV or replacement installation. This is a non-pressurized tank and must be vented during setup.

Skip it if you need 57 gallons of potable-water storage; the Ameri-Kart WT-5553 lists that capacity and BPA-free materials.

This A.A tank fits buyers replacing a 30-gallon fresh- or gray-water unit who can use its listed inlet and NPT connections. Account for fittings beyond the body dimensions and provide the required vent; it is not pressurized.

Listed on Amazon as: 30 Gallon RV Fresh/Gray Water Tank 34" x 18" x 12" – BPA Free (30 Gallon)

#7

7. RecPro RP-866033H

• Dimensions: 36"L x 36"W x 7"H
• Capacity: 57 gallons
• Material: Polyethylene (PE)

Best for: Shallow 57-gallon tank.

Why it ranks #7: Although listed as a 57-gallon fresh-water tank, its additional description refers to black-water-system sizes, making its intended RV use less clear.

The RecPro RP-866033H pairs 57 gallons of listed capacity with a 7-inch height, a useful profile for buyers checking low-clearance storage space. Its 36-by-36-inch footprint is broad, so the dimensions suit a different kind of installation than a tall, narrow tank. Polyethylene construction and the product title identify it as a fresh-water tank.

A 7-inch height can make this tank worth considering when vertical clearance is limited, while the 36-inch-by-36-inch footprint needs a wide, square mounting area. The 57-gallon capacity provides a sizable water reserve, and polyethylene is the listed tank material. RecPro describes the product as a fresh-water tank, although additional product information also refers to black-water-system size options; buyers should resolve that application detail before selecting it for a specific RV plumbing system.

Skip it if you need a narrow installation footprint; the classAcustoms T3500-TO measures 12 by 17.25 inches across.

Consider this RecPro tank when you need a 57-gallon reserve and have room for a broad, shallow footprint. Its listed fresh-water title and additional black-water wording make intended system use an important detail to resolve.

Listed on Amazon as: RecPro RV 57 Gallon Fresh Water Tank