
Original: $60.24
-65%$60.24
$21.08The Story
The GWS Heatwave Expansion Vessel is designed specifically for closed-loop heating and hydronic systems (including underfloor heating, radiators, and solar thermal systems). Important: This vessel is NOT suitable for potable (drinking) water applications. It features a durable butyl diaphragm and is pre-charged with nitrogen, offering reliable pressure management within your heating system to accommodate thermal expansion and help maintain stable pressure. Supplied complete with a robust mounting bracket for secure installation.
Why Choose This Vessel?
Specifically engineered for UK heating systems, this WRAS-approved expansion vessel ensures compliance and reliable performance in non-potable water circuits. The included galvanised bracket offers hassle-free installation flexibility. Always ensure the pre-charge pressure matches your system requirements.
Key Features:
- Application: Heating Systems / Hydronic Systems (Non-Potable Water Only)
- Type: Diaphragm Expansion Vessel
- Diaphragm Material: Butyl Rubber
- Pre-charge Pressure: 3.5 bar (adjustable as required)
- Maximum Working Pressure (PS): 6 bar
- Maximum Working Temperature (TS): 99°C
- Connection: 3/4" BSP M
- Body Material: Carbon Steel
- Internal Lining: Epoxy Coating
Why Choose This Vessel?
Specifically engineered for UK heating systems, this WRAS-approved expansion vessel ensures compliance and reliable performance in non-potable water circuits. The included galvanised bracket offers hassle-free installation flexibility. Always ensure the pre-charge pressure matches your system requirements.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
The GWS Heatwave Expansion Vessel is designed specifically for closed-loop heating and hydronic systems (including underfloor heating, radiators, and solar thermal systems). Important: This vessel is NOT suitable for potable (drinking) water applications. It features a durable butyl diaphragm and is pre-charged with nitrogen, offering reliable pressure management within your heating system to accommodate thermal expansion and help maintain stable pressure. Supplied complete with a robust mounting bracket for secure installation.
Why Choose This Vessel?
Specifically engineered for UK heating systems, this WRAS-approved expansion vessel ensures compliance and reliable performance in non-potable water circuits. The included galvanised bracket offers hassle-free installation flexibility. Always ensure the pre-charge pressure matches your system requirements.
Key Features:
- Application: Heating Systems / Hydronic Systems (Non-Potable Water Only)
- Type: Diaphragm Expansion Vessel
- Diaphragm Material: Butyl Rubber
- Pre-charge Pressure: 3.5 bar (adjustable as required)
- Maximum Working Pressure (PS): 6 bar
- Maximum Working Temperature (TS): 99°C
- Connection: 3/4" BSP M
- Body Material: Carbon Steel
- Internal Lining: Epoxy Coating
Why Choose This Vessel?
Specifically engineered for UK heating systems, this WRAS-approved expansion vessel ensures compliance and reliable performance in non-potable water circuits. The included galvanised bracket offers hassle-free installation flexibility. Always ensure the pre-charge pressure matches your system requirements.














