15mm Automatic Brass Bottle-Style Air Vent, Compression Release Valve | Compression Connection for Central Heating & Hot Water Systems | Maintenance-Free, No Servicing Required

15MM CONNECTION: Fits standard 15mm heating and hot water system pipework via a brass compression connection, making this automatic air vent a straightforward upgrade for domestic central heating installations and copper pipe runs. REMOVES TRAPPED AIR AUTOMATICALLY: Continuously releases air pockets from the system to improve water circulation, boost heating efficiency and reduce the gurgling and banging noises caused by trapped air in pipes and radiators. DURABLE BRASS CONSTRUCTION: Machined from solid brass for strong, corrosion-resistant performance that stands up to the heat and pressure of heating and hot water systems, giving long-lasting and reliable service year after year. BOTTLE-STYLE MAINTENANCE-FREE DESIGN: The compact bottle-shaped air release valve works on its own once fitted, venting air with no manual bleeding required and keeping your system running smoothly and quietly. IDEAL FOR CENTRAL HEATING & HOT WATER: Suited to central heating circuits and hot water systems where automatic air venting keeps water flowing freely, protects system efficiency and helps prevent airlocks from forming.