When choosing water storage for a boat, you want portable, durable tanks designed for potable use with secure fittings. This guide highlights five reliable options that balance capacity, install options, and hygiene. Ideal buyers include weekend boaters needing moderate storage, full-time sailors seeking reliability, and DIY boaters upgrading or replacing onboard water tanks. Below, compare sizes, fittings, and best-use scenarios to help you pick the right vessel-ready water tank.
Ameri-Kart 12 Gallon RV Fresh Water Tank
Best for compact boat setups requiring a potable water supply without adding heavy bulk. This 12-gallon tank is made in the USA from BPA-free materials and is suitable for drinking, cooking, cleaning, and showering. It offers multiple installation options with built-in fittings, including two 1.5″ balloon-style NPT outlets and two 0.5″ NPT outlets. Durable, weather-resistant plastics ensure sanitary, leak-proof storage and IAPMO standard compliance. A solid choice for small-to-mid-sized boats or RV-style galley setups on water.
Who it’s best for: small boats, dinghies, or auxiliary water systems on RV boats needing reliable, compact storage.
Limitations: fitting locations are fixed; plan mounting around shutoff valves and access points.
Ameri-Kart 19 Gallon RV Fresh Water Tank
This 19-gallon option balances capacity with space, ideal for mid-sized boats needing more on-board drinking water without excessive bulk. It uses BPA-free materials and includes two 1.5″ balloon-style NPT outlets plus two 0.5″ outlets for versatile plumbing. Durable, weather-resistant plastic keeps water clean and leak-proof, with IAPMO compliance. Suitable for longer coastal trips or weekend sailing where additional water is advantageous.
Who it’s best for: boats that require more water capacity without enlarging the footprint significantly.
Limitations: larger footprint than a 12-gallon tank; ensure mounting clearance and hose routing align with the boat’s layout.
Ameri-Kart 29 Gallon RV Fresh Water Tank
Choose this for boats that need a larger onboard reservoir without installing a gravity-fed system. The 29-gallon tank provides ample potable water for longer trips, with built-in fittings including two 1.5″ balloon-style NPT outlets and two 0.5″ outlets. Built to withstand weather and impact with sanitary, leak-proof performance, and IAPMO standards compliance. A solid option for motoryachts, larger sailboats, or RV-style marine setups where space allows.
Who it’s best for: larger boats or extended cruises needing considerable water storage.
Limitations: heavier and wider; plan anchor points and weight distribution to avoid handling problems at sea.
Akozon RV Water Storage, 10 Gallons
This 10-gallon tank offers a compact option with a large 100 mm diameter inlet and a sealed cover for quick filling. It is designed for wide applications, including RVs, trailers, yachts, boats, and households. Its smooth surface allows easy modification to fit a specific boat layout. A practical choice for boats needing a modest supplement to onboard storage with flexible installation options.
Who it’s best for: smaller boats or boats needing an upgrade to existing water systems without large tanks.
Limitations: lower capacity compared to larger tanks; may require more frequent refills on longer trips.
LOFTANK 30 Gallon Water Tank
The LOFTANK 30-gallon bladder provides expansive capacity with a portable, flexible design. Made from thick PVC with reinforced seams, it stores water efficiently for camping or marine use. A 3/4″ spigot ensures controlled dispensing. This option is notable for off-grid or smaller vessel deployments where a rigid tank would be impractical. It’s a good fit for boats that require substantial emergency or bulk water storage without rigid plumbing constraints.
Who it’s best for: boats needing large, portable water storage that can be stowed when not in use.
Limitations: collapsible design may require careful securing to prevent movement and sloshing during navigation.
Buying Guide
- Capacity vs. space: Match tank size to your boat’s storage area and daily water needs. Small crafts benefit from 12–19 gallons; larger boats may justify 29 gallons or more.
- Material safety: Look for BPA-free materials and tubing fittings designed for potable water to ensure hygiene and compliance with IAPMO standards.
- Fittings and install options: Check outlet sizes and included fittings. Ensure the tank supports your preferred plumbing layout (under-sink, galley, or head).
- Installation ease: For boats, choose tanks with built-in fittings that simplify mounting and reduce the amount of custom fabrication required.
- Durability and transport: Weather resistance matters for outdoor storage areas or exposed compartments. Consider rigid tanks versus collapsible bladders depending on stowage and movement.
- Maintenance: Easily accessible openings, smooth interior surfaces, and straightforward cleaning procedures help maintain potable water quality on long journeys.
- Future upgrades: If you anticipate upgrading your water system, pick tanks with flexible fittings or additional outlet options to accommodate plumbing expansions.
Frequently Asked Questions
- What size water tank should I choose for a small boat? A 12–19 gallon tank is usually sufficient for short trips and minimal crew, with room for refill during travel.
- Are RV water tanks suitable for boats? Yes, many RV tanks are designed for potable water storage and can be used on boats if they fit the available space and mounting requirements.
- Do these tanks require special fittings? Most include standard NPT fittings (1.5″ and 0.5″), but verify compatibility with your boat’s plumbing adapters.
- Is a collapsible bladder better than a rigid tank? Bladders save space when not in use and are portable, but they may require secure mounting to prevent movement while sailing.
- Can I install multiple tanks on my boat? Yes, multiple tanks can be plumbed in parallel or series to achieve desired capacity and redundancy.
- What maintenance is needed for onboard water tanks? Regular cleaning, sanitization, and inspection of fittings help maintain potable water quality and prevent leaks.
Summary of selected products
| Product | Capacity | Best For | Notes |
|---|---|---|---|
| Ameri-Kart 12 Gal | 12 gallons | Compact boats, auxiliary supply | Multiple in/out fittings, BPA-free |
| Ameri-Kart 19 Gal | 19 gallons | Mid-sized boats, longer trips | Balanced size and capacity |
| Ameri-Kart 29 Gal | 29 gallons | Larger boats, extended cruises | High capacity, robust |
| Akozon 10 Gal | 10 gallons | Small boats, quick upgrades | Compact, easy to modify |
| LOFTANK 30 Gal | 30 gallons | Large storage, portable bladder | Flexible, high capacity |