Grant Pressure Relief Valve 6 Cylinders Pre Nov 2010 Gcs08

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Grant Pressure Relief Valve 6 Bar – Cylinders Pre-November 2010

Part Number: GCS08
Application: Unvented Hot Water Cylinders (pre-Nov 2010 models)
Type: Safety Pressure Relief Valve (PRV)

Ensure safety and compliance in legacy hot water systems with the Grant GCS08 Pressure Relief Valve (6 Bar). Specifically designed for use with Grant cylinders manufactured before November 2010, this OEM safety valve protects your system from excessive pressure build-up by safely releasing water if internal cylinder pressure exceeds the threshold.

A critical component in unvented cylinder systems, this PRV helps meet G3 building regulation safety standards. Whether you're conducting routine maintenance, repairing an older unit, or replacing a worn or faulty valve, the GCS08 provides peace of mind and reliable performance.

Key Features

• Genuine Grant replacement part – factory-specified for cylinders made pre-Nov 2010

• Factory-set to open at 6 bar pressure for reliable protection

• Suitable for unvented hot water systems with legacy Grant cylinders

• Helps prevent damage due to over-pressurisation

• Durable brass construction with precision-engineered internal mechanism

• Straightforward retrofit for older systems

• Vital for compliance with G3 unvented cylinder safety regulations

Compatible With

• Grant unvented cylinders manufactured before November 2010

  • Including models where a 6-bar PRV is specified

  • Always verify manufacture date and pressure rating before installation

If you're unsure about compatibility, our technical team is here to help confirm the correct part.

When to Replace

• If the current valve fails to open under pressure

• During annual cylinder servicing or G3 safety checks

• If you notice drips, leaks, or corrosion around the PRV

• When retrofitting or upgrading a cylinder with ageing components

• After system pressure testing reveals faulty relief function

Technical Specifications

• Part Number: GCS08

• Pressure Rating: 6 Bar

• Material: Brass with pressure-tolerant internal seal

• Connection Type: Typically 15mm compression (confirm against existing setup)

• Application: Unvented cylinder pressure relief

• Standard Compliance: G3 Building Regulations (Safety Devices)