Worcester Bosch Pipe PRV 8737603356

The Pipe PRV is a pressure relief valve pipe manufactured by Worcester Bosch. It is part of the pressure relief arrangement on Worcester Bosch Greenstar combi boilers, where it handles the discharge path from the pressure relief valve. The part is listed under Worcester Bosch part number 8737603356.

• Water weeping or discharging continually from the pressure relief pipework
• System pressure gauge reading climbing or sitting above the normal range
• Boiler losing pressure repeatedly with no leak found elsewhere on the system
• Visible corrosion, scaling or physical damage to the relief pipe

• Confirm the existing component carries part number 8737603356.
• Check the appliance model against the fit list above, noting that both 25 C and 30 C combi variants in NG and LPG are covered.
• Inspect the relief valve and surrounding pipework before ordering, as discharge faults can originate at the valve rather than the pipe.
• Check the system pressure and the relief discharge termination point as part of the diagnosis.