What is a air bleed screw and what are they for?
All wet radiators have a air bleed screw. Once installed, the complete system needs to be filled with water (ideally soft water with a corrosion inhibitor). During this process the air bleed screw on each radiator in turn needs to be opened to allow the air pocket in the unit to be pushed out by the rising water. Hissing air, followed by the first show of water demonstrates that the radiator is full. Close the bleed screw quick! Puravent is a trading website owned by Adremit Limited, Unit 5, Commercial Courtyard, Settle, North Yorkshire BD24 9RH. Company registered in England and Wales Company number 4737680.
