A Glow-worm pressure relief valve helps to control pressure build-up within a central heating system. It is set to open in the event of a pressure build-up, releasing excess water to ensure the pressure doesn't reach a dangerous level.
Colour is black and red
Technical specification
Waist Sizeaa32ci94gtTypePressure Relief ValveColourBlackSupplier Part Number0020118190Manufacturer Model No0020118190/SDBrand NameGlow-Worm