Best Flexible Water Tank Options for Boats and RVs
When space is tight on a boat, flexible water tanks offer a lightweight, adaptable solution for storing fresh water. These bladder-style tanks conform to irregular spaces, are easy to install, and can be a cost-effective alternative to rigid tanks. This guide highlights five suitable options and related accessories to help you choose the best flexible water storage for marine use, shower and kitchen needs, and mobile living setups.
| Product | Brand | Capacity | Notes |
|---|---|---|---|
| NuovaRade Flexible Water Tank/Bladder, 29x24in | Nuova Rade | 14.5 Gallon (55 Lt) | Rectangular, includes welded fittings |
| NuovaRade Flexible Water Tank, 29x33in | Nuova Rade | 20 Gallon (75 Lt) | Rectangular, space-saving shape |
| NuovaRade Flexible Water Tank, 29x59in | Nuova Rade | 40 Gallon (150 Lt) | Rectangular, larger capacity |
| A.A 1-3/8″ Fill Hose | A.A | 3 Feet (per unit) | Flexible hose for filling RV tanks |
| 1-3/8″ Fill Hose for RV Concession | Automotive Authority LLC | 3 Feet | Flexible, clamps needed for secure fit |
Introduction: Flexible water tanks make a practical choice for boats with limited space or irregular hull compartments. The NuovaRade line offers multiple capacities with standard fittings, while compatible fill hoses facilitate easy connections to water systems on board. The following sections present five relevant products, each with design features that support stability, portability, and reliable sealing in marine environments.
NuovaRade 29x24in Flexible Water Tank
The NuovaRade 29x24in flexible water tank is designed for lightweight, form-fitting storage of non-drinkable fresh water. It includes two welded fittings: a Ø 38 mm inlet and a Ø 12 mm outlet valve with moveable thread tightening rings for maximum sealing. Metal hooks support hanging and improved stability. Constructed from non-toxic PVC, the tank resists tearing and abrasions while remaining waterproof. Its compact design supports easy storage in boats, cars, RVs, garages, or homes, providing a practical solution when rigid tanks won’t fit.
NuovaRade 29x33in Flexible Water Tank
This NuovaRade model expands capacity with a 29x33in footprint, offering 20 gallons (75 Lt) of storage. It uses the same corrosion-resistant fittings and secure sealing mechanism, ensuring stable water containment. The tank’s soft-shell construction keeps weight low and provides flexibility to fit irregular compartments on boats. As with the smaller variant, it includes metal hooks for mounting and is built from non-toxic PVC for durability in marine settings.
NuovaRade 29x59in Flexible Water Tank
This larger NuovaRade option measures 29×59 inches and provides 40 gallons (150 Lt) of storage. It keeps the same core advantages: quick installation, two welded fittings (Ø 38 mm inlet and Ø 12 mm outlet), metal fixing hooks, and a non-toxic PVC construction. The extended length enables deeper hull cavities to accommodate bigger water reserves without compromising stability. It remains a practical solution where rigid tanks are impractical.
A.A 1-3/8″ Fill Hose for RV Fresh Water Tank
The A.A fill hose is a flexible 1-3/8″ ID hose designed for connection to RV gravity-feed water systems. It includes flats for easy clamping and is made from ethylene copolymer to resist kinking. The length is 3 feet, with tolerance for a small variation, enabling straightforward hookups to water tanks on boats or RV setups. It works as a practical companion to flexible water storage systems when filling is required.
1-3/8″ Fill Hose for RV Concession
This 1-3/8″ fill hose is provided by Automotive Authority LLC for RV concessions and similar installations. It is designed for use with hose clamps (not included) and features ethylene copolymer construction for flexibility and resistance to kinking. The 3-foot length is suitable for gate-valve style connections and compact marine setups where space is at a premium.
Buying Guide: Key Purchase Considerations
- Capacity and space: Choose a tank size that fits available hull space while meeting daily water needs. Larger models offer more storage but require bigger mounting areas.
- Fittings and seals: Ensure inlet and outlet fittings match your plumbing. Welded fittings and secure seals reduce leaks and simplify installation.
- Material safety: Opt for non-toxic PVC or equivalent marine-grade materials to minimize contamination risk and enhance durability in damp environments.
- Stability and mounting: Tanks with metal hooks or mounting points improve stability in movement, reducing sloshing while underway.
- Maintenance: Consider ease of cleaning and deodorizing; compatible accessories like tank flush products can simplify upkeep on long trips.
- Compatibility with hoses: If hoses are part of your system, verify hose ID (inner diameter) and length to ensure proper fit and minimal pressure loss.
- Portability: For boats with modular layouts, lighter, flexible tanks enable flexible placement and easier removal for winterization or storage.
Notes on use: The NuovaRade tanks are designed for non-drinkable fresh water (kitchen and shower use) and come ready to install with two welded fittings. They are intended as practical solutions when rigid tanks are not feasible. Hose products listed provide compatible connections and flexibility for marine water systems but are not standalone tanks.