The best 22-gallon water tank depends on whether you need a portable container or a tank installed in an RV, trailer, or other vehicle. The BARKER Tote-Along is the closest match to an exact 22-gallon capacity and is suited to buyers who need a wheeled tank. For fixed potable-water storage, consider the RecPro 21-gallon or Ameri-Kart 20-gallon tank. The 21-gallon slim tank suits narrow installation spaces, while the RecPro combo provides both 21- and 30-gallon tanks.
| Product | Capacity | Best suited for |
|---|---|---|
| BARKER Tote-Along | 22 gallons | Portable water transport |
| RecPro RV Fresh Water Tank | 21 gallons | RV and trailer fresh-water storage |
| Ameri-Kart Cube Tank | 20 gallons | Potable water and flexible fitting placement |
| 21-Gallon Slim Tank | 21 gallons | Shallow installation areas |
| RecPro Fresh and Gray Tank Combo | 21 and 30 gallons | Separate water-storage needs |
BARKER Tote-Along 22-Gallon Tank
Best for: Buyers who want an exact 22-gallon capacity in a portable tank. Unlike the other listed options, this product is designed as a tote with wheels rather than solely as a fixed RV tank.
Its listed features include blow-molded polyethylene construction, zinc-plated steel brackets, extra-large heavy-duty wheels, and standard bayonet fittings. The tank weighs 16 pounds when empty, a useful specification when planning to move or store it.
Why it stands out: The capacity matches the search directly, and the wheels address the practical challenge of moving a water-filled container. Consideration: It weighs 16 pounds before filling, so account for the empty tank’s weight as well as its contents when handling it.
RecPro 21-Gallon RV Fresh Water Tank
Best for: RV and trailer owners seeking a fixed tank for fresh drinking water. This is a close-capacity alternative to a 22-gallon tank, holding 21 gallons.
RecPro describes this tank as made from polyethylene and designed for RV and trailer camping. The listed features emphasize road use and fresh-water storage, with the water also serving as a backup supply in an emergency.
Why it stands out: Its stated use is specifically RV and trailer fresh-water storage, making it a more targeted choice than a general-purpose container. Consideration: The supplied product details do not give tank dimensions or fitting specifications, so check that information before planning an installation.
Ameri-Kart 20-Gallon Cube Water Tank
Best for: Buyers who need potable-water storage for an RV, motorhome, trailer, camper, food truck, or tiny house. Its 20-gallon capacity is slightly below the 22-gallon target.
The tank measures 21 by 17 by 14 inches. Listed features include BPA-free materials and four built-in threaded female NPT fittings: two 1.5-inch fittings and two 0.5-inch fittings. The product information describes the plastic as weather- and impact-resistant and the tank as sanitary and leak-proof.
Why it stands out: The stated dimensions and fitting locations make it easier to compare with an installation space and plumbing plan. Consideration: Confirm that the cube shape, overall dimensions, and fitting sizes suit the intended setup before buying.
21-Gallon Slim Fresh Or Gray Water Tank
Best for: Buyers comparing close-to-22-gallon tanks for a shallow or narrow installation area. Its listed dimensions are 39 by 16 by 8 inches, excluding fittings.
This 21-gallon tank is made from polyethylene and uses rotational molding. The product description identifies it for fresh or gray water and notes a one-piece seamless construction.
Why it stands out: The slim 8-inch listed height may be relevant when comparing available installation space, and the long, shallow shape differs from a cube tank. Consideration: The stated dimensions exclude fittings, so allow for fitting placement and clearance when checking fit.
RecPro 21- And 30-Gallon Tank Combo
Best for: Buyers who need more storage than a single 22-gallon tank can provide or want a two-tank package for an RV, trailer, camper van, or food truck. The package includes one 21-gallon tank and one 30-gallon tank, for 51 gallons combined.
RecPro lists seamless, one-piece rotational-molded construction with 1/8-inch-thick walls. The product description says the tanks undergo pressure testing and are designed for fresh- or gray-water use.
Why it stands out: The two capacities offer more total storage than the other choices. Consideration: This is a larger combo, not a single tank near 22 gallons; check the space and water-storage requirements for both tanks.
Buying Guide: How To Choose A 22-Gallon Water Tank
Do you need a portable tank or a fixed installation?
Choose the BARKER Tote-Along if you need a wheeled container for transport. For an RV or trailer installation, compare the fixed tanks by capacity, dimensions, and fitting details. A portable tote and a built-in tank serve different purposes, even when their capacities are similar.
Is a 20- or 21-gallon tank close enough?
Choose a 20- or 21-gallon model if a small capacity difference is acceptable and the tank better suits your installation. The BARKER is the only listed option with an exact 22-gallon capacity. Capacity alone does not establish that a tank will fit: compare its shape, dimensions, and fittings with the available space and plumbing.
What should you check before installing a tank?
- Measure the available length, width, and height. Include clearance for fittings, which may not be included in listed dimensions.
- Match fitting sizes and locations to the planned plumbing. The Ameri-Kart listing provides fitting sizes; the supplied details for some other tanks do not.
- Confirm whether the intended use is potable fresh water, gray water, or portable storage. Product descriptions identify different uses across these options.
- Consider whether you need one tank or separate tanks. The RecPro combo provides a 21-gallon tank and a 30-gallon tank rather than one 22-gallon vessel.
Frequently Asked Questions
Which listed tank holds exactly 22 gallons?
The BARKER Tote-Along Tank is listed at 22 gallons. The other options hold 20 or 21 gallons, or come as a two-tank combo.
Which option is designed for RV fresh-water storage?
The RecPro 21-gallon tank is described specifically for RV and trailer fresh-water storage. The Ameri-Kart tank is also listed for potable water use in RVs and other applications.
Which tank has the most clearly specified dimensions?
The Ameri-Kart listing gives dimensions of 21 by 17 by 14 inches. The 21-gallon slim tank is listed at 39 by 16 by 8 inches, excluding fittings.
Can these tanks be used for gray water?
The 21-gallon slim tank and the RecPro combo are described for fresh or gray water. Check the product details and intended use before selecting a tank for a specific water type.
Is a 21-gallon tank a practical substitute for a 22-gallon tank?
It can be if one gallon less capacity is acceptable and the tank’s dimensions and fittings match the installation. Choose the BARKER Tote-Along if an exact 22-gallon listed capacity is the priority.