The Vaillant pressure relief valve helps to control pressure build-up within a closed system. It is set to release water if the pressure is too high to ensure the pressure doesn't reach a dangerous level.
Pressure is 3 bar
Technical specification
TypeTemperature and Pressure Relief ValveManufacturer Model No0020009866Brand NameVaillant
Reviews
Vaillant Temperature and Pressure Relief Valve 0020009866