8-Gallon Portable RV Water Holding Tank – Leakproof LLDPE

Portable 8-Gallon RV Water Holding Tank

Keep fresh water flowing on every adventure with this rugged portable 8-gallon water holding tank. Engineered for RVs, trailers, campers, and boats, this compact, square-profile container is built from high-quality LLDPE (Linear Low-Density Polyethylene) — a tough, food-grade-safe material known for excellent impact resistance, flexibility, and long-lasting durability. Whether you're parked at a campsite, cruising on the water, or living life on the road, this tank delivers reliable, leakproof water storage wherever you need it.

Key Features

• 8-Gallon Capacity: Holds up to 8 gallons (approx. 30 litres) — plenty of water storage for extended trips.
• Leakproof Design: Precision-sealed inlet and construction prevent drips, seepage, and cracks, keeping your storage space clean and dry.
• Impact-Resistant LLDPE Material: Flexible yet strong, LLDPE resists cracking under pressure, vibration, and temperature fluctuations common in mobile environments.
• Space-Saving Square Shape: The flat, low-profile square footprint (approx. 660 × 340 × 140 mm / 26 × 13.4 × 5.5 in) fits neatly under benches, in bays, and in tight compartments.
• 85mm Inlet: Wide inlet opening makes filling and cleaning straightforward and hassle-free.
• Versatile Use: Ideal for RVs, travel trailers, campers, motorhomes, and boats — anywhere a compact freshwater or grey water holding solution is needed.
• Lightweight & Portable: Easy to carry, position, and reposition thanks to its manageable weight and ergonomic shape.

Product Specifications

• Material: LLDPE (Linear Low-Density Polyethylene)
• Capacity: 8 Gallons (approx. 30L)
• Dimensions: Approx. 660 × 340 × 140 mm (26 × 13.4 × 5.5 in)
• Inlet Diameter: 85mm
• Color: Black
• Compatible With: RVs, trailers, campers, motorhomes, boats

Why LLDPE?

LLDPE is a preferred material for portable water containers because of its superior resistance to stress cracking, impact, and environmental exposure. It remains flexible even in cold conditions, reducing the risk of damage during transport or storage. For more information on safe plastic materials used in water storage, visit the U.S. Environmental Protection Agency – WaterSense.

Perfect For

• RV and motorhome freshwater or grey water storage
• Boat and marine water storage
• Camping and overlanding water supply
• Travel trailer holding tank replacement or supplement
• Off-grid and emergency water storage

Frequently Asked Questions

Q: What is the capacity and size of this portable RV water holding tank?

A: This portable water holding tank has an 8-gallon (approx. 30L) capacity and measures approximately 660 × 340 × 140 mm (26 × 13.4 × 5.5 inches). Its flat, square profile is designed to fit easily into tight spaces under benches or in storage bays of RVs, trailers, campers, and boats.

Q: What material is this water container made from, and is it durable?

A: The tank is constructed from LLDPE (Linear Low-Density Polyethylene), a high-performance plastic known for its outstanding impact resistance, flexibility, and resistance to cracking. It is well-suited for mobile environments where vibration, temperature changes, and physical knocks are common, making it an excellent long-term water storage solution for outdoor and travel use.

Q: How does this tank prevent leaks?

A: The tank features a precision-engineered leakproof design with a secure 85mm inlet seal. The LLDPE construction resists stress cracking, and the tight-fitting inlet closure ensures no water escapes during transport or storage, keeping your RV or boat compartments clean and dry.

Q: Is this tank suitable for use on boats as well as RVs?

A: Yes! This portable water holding tank is designed to be versatile across multiple applications — including RVs, travel trailers, motorhomes, campers, and boats. Its compact, low-profile shape makes it easy to secure in different vessel or vehicle configurations.