Polytank Coffin Tanks

Polytank Coffin Tanks are compact, low-profile water storage tanks designed specifically for installations where height and space are restricted. Manufactured from high-quality, UV-stabilised polyethylene, these tanks offer exceptional strength, durability, and resistance to corrosion—making them ideal for domestic, commercial, and agricultural water storage applications.

Their slim, elongated “coffin-shaped” design allows them to fit neatly under floors, in loft spaces, beneath decking, or in other tight locations where traditional vertical tanks cannot be used. Polytank’s one-piece moulded construction ensures structural integrity and prevents leakage, while the tank’s smooth internal surfaces help maintain water quality.

Lightweight, easy to handle, and simple to install, Polytank Coffin Tanks provide a reliable solution for storing potable or non-potable water in confined or difficult spaces.

Key Features

• Low-profile, space-saving design for restricted-height installations

• Manufactured from UV-stabilised polyethylene for long service life

• One-piece, seamless construction for added strength and leak prevention

• Suitable for potable and non-potable water storage

• Lightweight and easy to transport and position

• Corrosion-resistant and maintenance-free

• Available in a range of capacities to suit various applications

• Compatible with standard fittings, lids, and connections

Typical Applications

• Under-floor and loft water storage

• Restricted-height plant rooms and service areas

• Garden irrigation or rainwater harvesting

• Agricultural and horticultural water supply

• Caravan, cabin, and outbuilding water systems

• Backup or emergency water storage