Vaillant 20275015 pressure relief valve 3 bar

This Vaillant pressure relief valve is a replacement part suitable for use with Guernsey/Jersey only (condensing), ecoFIT VUW (condensing), ecoTEC VU (condensing), ecoTEC VUI (condensing), ecoTEC VUW (condensing), Home (condensing), ecoFIT VU (condensing), VWL (heat pump accessory) and VWL (heat pump) boilers. The pressure relief valve helps to control pressure in a closed system by proportionally opening to relieve excess pressure, preventing catastrophic malfunction.