Finding the right 22 gallon water tank or close alternative ensures reliable fresh water storage for RVs, campers, and off-grid setups. This guide compares five practical options, highlighting who benefits most from each, durability notes, and installation considerations. The top picks emphasize portability, ease of installation, and leak-proof designs. Whether you’re outfitting a travel trailer, a food truck, or a tiny home, these tanks offer clear advantages for potable and grey water storage. Use the Buying Guide below to decide which tank best fits your vehicle size, mounting options, and water needs.
| Product | Brand | Approx. Capacity | Notes |
|---|---|---|---|
| BARKER 11104 Tote-Along Tank | BARKER | 22 Gallon | Heavy-duty wheels; zinc brackets; bayonet fittings |
| Ameri-Kart 20 Gallon RV Fresh Water Tank | Ameri-Kart | 20 Gallon | Made in USA; BPA-free; multiple fittings |
| RecPro Fresh and Gray Water Holding Tank Combo | RecPro | 21 & 30 Gallon | Seamless one-piece construction |
| Ameri-Kart 29 Gallon RV Fresh Water Tank | Ameri-Kart | 29 Gallon | Potable water; multiple installation options |
| RecPro RV Fresh Water Tank 21 Gallon | RecPro | 21 Gallon | Made in USA; durable polyethylene |
Each product is evaluated for suitability based on capacity alignment with 22 gallons, installation flexibility, durability, and best-use scenarios. The table above helps compare core factors at a glance and sets the stage for deeper dives into each option.
BARKER Tote-Along Tank 22 Gallon
Brand: BARKER. Features include 16 pounds empty weight, blow-molded polyethylene construction, and zinc-plated steel brackets throughout. Extra large, heavy-duty wheels and standard bayonet fittings are included on all tanks except the 5 gallon size. Best for owners needing a portable, wheeled tank with robust mounting hardware to support frequent transport and quick setup.
Who it’s best for: RV owners or mobile vendors needing a ready-to-move tank with sturdy wheels and simple fittings. Why selected: Provides a complete package for mobility and durability in one 22-gallon unit. Caution: Verify compatibility of bayonet fittings with your current plumbing setup if you’re upgrading from a different type.
Ameri-Kart 20 Gallon RV Fresh Water Tank
Brand: Ameri-Kart. This tank is BPA-free and made in the USA for potable water use, including drinking, cooking, showering, and dishwashing. Installation is flexible with multiple fitting options, including two 1.5″ balloon-style NPT and two 0.5″ NPT fittings. Best for: RVers seeking a durable, sanitary tank with versatile installation choices. Caution: It’s a 20 gallon model, so plan for slightly smaller capacity if 22 gallons is a strict requirement.
RecPro Fresh and Gray Water Holding Tank Combo
Brand: RecPro. This dual-tank package includes a 21-gallon and a 30-gallon tank, offering a combined storage solution of 51 gallons for fresh or gray water. Construction emphasizes a seamless, one-piece rotational mold with 1/8″ thick walls for durability and leak-proof performance. Best for: Businesses or families needing substantial off-grid water storage with separate fresh and gray water options. Caution: The package includes two tanks; ensure you have adequate mounting space and weight distribution for installation.
Ameri-Kart 29 Gallon RV Fresh Water Tank
Brand: Ameri-Kart. This 29-gallon potable water tank is designed for RVs, motor homes, and trailers, with multiple installation options and BPA-free materials. The built-in fittings include two 1.5″ NPT and two 0.5″ NPT connections. Best for: RV users needing near-22-gallon capacity with an extra margin for longer trips. Caution: Slightly larger footprint; confirm space availability in the mounting area.
Class A Customs UM-2000 20 Gallon UnderMount Tank
Brand: classAcustoms. This under-mount tank measures about 48 inches long, with a thickness around 7/32 inches. It includes two 1.5″ NPT fittings and two 0.5″ fittings. Best for: Vehicle owners who need a low-profile, undercarriage water tank with flexible mounting. Caution: A longer length may require precise mounting clearance and additional fittings selection.
RecPro RV Fresh Water Tank 21 Gallon
Brand: RecPro. Made for RV and trailer camping, this polyethylene tank is designed to withstand travel and provide a reliable fresh water source. It is proudly made in the USA and offers a capacity of 21 gallons. Best for: RV travelers seeking a compact, USA-made tank with straightforward installation. Caution: Capacity is 21 gallons, which is slightly below 22 gallons but closely aligned for many setups.
DreamDragon 21 Gallon Outdoor Water Storage Tank
Brand: dreamdragon. This rectangular translucent white tank provides 21 gallons, suitable for outdoor camping, farms, or backyards. Constructed from BPA-free PVC and thick polyethylene, it is designed for durability and multi-use storage, including emergency water storage. Best for: Outdoor enthusiasts needing a large-capacity, versatile water storage option. Caution: Not explicitly specified for potable use beyond standard BPA-free material claims; verify local regulations for drinking water use if needed.
Buying Guide: Key Purchase Considerations
Capacity alignment: If you specifically need 22 gallons, prioritize tanks closest to that capacity and verify internal volume vs. external dimensions to fit mounting spaces.
Material and safety: BPA-free plastics are standard for potable water. For gray water or non-potable uses, confirm compatibility with your system and local codes.
Fittings and installation: Check the number and type of fittings (NPT sizes) and whether the tank supports your preferred mounting orientation (under-mount, side-mill, or wheel-mounted).
Durability: Look for rotational molding or seamless construction to reduce weak points. Consider tanks with reinforced brackets or heavy-duty wheels if mobility is important.
Brand and availability: Choose brands with readily available parts, replacement fittings, and clear installation guidelines to minimize setup time.
Frequently Asked Questions
- What is the typical difference between 21 and 22 gallons in RV tanks? A: The practical difference is often the footprint and mounting requirements; 21-gallon tanks are very common and close in size to 22 gallons, suitable for similar installations.
- Can I use a non-potable tank for drinking water? A: Drinking water tanks should be BPA-free and are designed for potable water uses; always follow manufacturer guidelines and local regulations.
- Are under-mount tanks space-saving? A: Yes, under-mount tanks can maximize available space in tight vehicle configurations but require precise mounting and access for fittings.
- Do these tanks require special maintenance? A: Regular inspection for cracks or leaks, proper cleaning, and ensuring fittings are tight and not corroded help maintain performance.
- Is a combo fresh/gray tank advantageous? A: Yes, for larger setups needing separate water streams or backup capacity, but it requires planning for separate plumbing lines.