Do you have a anti-'water-hammer' vessel fitted in a place where it could get really hot during the day, enough to cause the pressure to climb? This amount includes seller specified domestic postage charges as well as applicable international postage, dispatch, and other fees. It incorporates pressure reducing valve, pressure relief valves, check valve, and filter in a single valve design. it is a pressure reducing valve (3 bar) on the main inlet feed with a 6 bar safety release valve, it is the safety release valve that is dripping into the tundish, it was doing this approx. Specification Part Number 533112CST, F0001223 gtin 8016615624090 Maximum working Temp 65°C Max Inlet Pressure On Application 12.But thought best to change the whole thing, and now 6 months later dripping again, to my knowledge not been activated, so annoying faulty again after such short period?