Ariston O-rings, gaskets and washers are used in lots of different areas within the boiler. They are used to create seals between pipework and other parts within the boiler. Heat exchangers, gas valves and many other parts require O-rings, washers and gaskets to prevent leaks of gas or water from occurring.
Measurement is 9.525 mm
Technical specification
TypeGasketManufacturer Model No573521Brand NameAriston