Grant Temperature & Pressure V Alve " M X 22Mm Compression

90 C 7 bar 400 - 500 ltr models Probe length: 99mm

Grant Temperature & Pressure Relief Valve – GCS17

Part Number: GCS17
22mm Compression x Male Connection
Suitable for Grant Cylinders and Thermal Stores

Ensure your unvented hot water system operates safely and efficiently with the Grant GCS17 Temperature & Pressure Relief Valve. Designed to release excess pressure and temperature within the cylinder, this safety-critical component helps prevent potential system damage or failure.

Compatible with all Grant unvented hot water cylinders, the GCS17 is a genuine OEM spare featuring a 22mm compression connection and male thread, making installation quick and secure for both professionals and competent DIY installers.

Key Features

• Temperature & pressure relief in one valve – protects against overpressure or overheating

• Genuine Grant-approved safety component

• 22mm compression x male thread connection

• Maintains safe operation of unvented hot water cylinders

• Durable brass body and heat-resistant internals

• Reliable spring-loaded mechanism for automatic operation

• Suitable for new installations or maintenance replacements

Compatible With

• All Grant unvented cylinders, including:

  • Grant Wave Cylinders

  • Grant DuoWave & Integrated Thermal Stores

  • Older and current Grant cylinder models

Always check your cylinder’s technical documentation or contact us for confirmation of fit.

When to Replace

• Valve leaking or dripping under normal pressure

• Signs of corrosion or limescale build-up

• Failure to discharge when tested

• During annual service or cylinder upgrade

Technical Specifications

• Part Number: GCS17

• Connection: 22mm compression x male

• Max Pressure Rating: Typically 6 bar (verify with your model's specifications)

• Temperature Relief Setting: Typically 90–95°C

• Material: Solid brass construction with temperature-sensitive mechanism

• Function: Safety valve for use with pressurised hot water systems