Alpha C, Cd Pressure Release Valve 1.011126
This pressure release valve is a safety device that prevents the boiler from over pressurising. Most of these safety valves are set at 3bar pressure ensuring that the device will open and release pressure at 3bar. The valve is releases the pressurised water to the outside of the property via pipework that runs from the boiler to the outside of the property. The most common reason the prv operates is due to the expansion vessel not working correctly.