The Polytank Byelaw 30 18L Primary Expansion Tank is a durable, space-saving solution for managing water expansion in central heating or hot water systems. With an 18-litre capacity, it’s designed for smaller installations, providing reliable performance without taking up unnecessary room.

Complete and Easy to Install

Each Polytank expansion tank is supplied as a full package, including fittings and instructions, so setup is straightforward. The PT2 insulation kit is also included, helping maintain efficiency and ensuring compliance with British Standards.

Certified for Safe Use

Like the rest of the Polytank range, this model is both WRAS approved and BS4213:2004 Kitemarked, guaranteeing that it meets the necessary requirements for storing and managing water safely. Its robust construction and supplied lid keep the system secure and performing as expected over the long term.