An Advanced Water Heatrae Saida pressure relief valve is to prevent a dangerous build-up of system pressure. They are commonly used in most domestic properties and can be found on boilers and unvented cylinders. It is designed to open up to release the pressure when the level becomes too high and close again when the pressure has dropped to within a safe range.

• Pressure and temperature relief valve
• Designed for Heatrae Sadia cylinders