Deltafix radiator air vent key galvanised uni. 1 pc

With this galvanized radiator or vent key you can vent a central heating system or radiator. If your heating does not get completely hot or starts to make noise, there may be air in your system. By turning the vent button with the key open, the air escapes and the radiator becomes completely warm again. You may then have to top up your central heating boiler.