Robust expansion vessels that prevent excessive pressure building up in heating and cold water systems.
Discover our range
Reliance Valves Expansion Vessels ensure safe operating levels by preventing pressure from building up in sealed heating systems and cold water systems.
Our Aquasystem range features replaceable membranes to allow quick and easy servicing in situ. It also prevents water from coming into contact with the shell, eliminating corrosion and extending product lifespan.
Available with 2 to 5,000 litre capacity, our expansion vessels are suitable for both domestic and commercial applications. The range also includes replacement membranes and expansion vessel fixing kits for fast and simple installation.