1/2" Combined Safety & Non-Return Valve extension the cap is easily secured

the cap is easily secured to the top of a masonry chimney which is no longer to be used

- Helps to prevent the entry of debris and bird nesting materials

- 70mm in height for 150mm version and 85mm in height for 200mm version

- Shut off zero leakage

Thermowatt thermostat (dual element models)

1/2" Combined Safety & Non-Return Valve extension the cap is easily securedDESCRIPTION: A safety valve is designed to relieve any pressure in a heating system where the component are unable to accommodate any rapid and excessive pressure build up. Either type of valve should be fitted as close to the boiler as possible, and should incorporate a " pipe connection which enables discharge to a point outside of the building. It should discharge in a position which is noticeable, BUT NOT where any discharge may cause bodily