Caleffi Brass Air Relief Valve Fitting:CALEFFI 15MM (1/2") MI BRASS AIR RELIEF VALVE With an open impeller

With an open impeller

Quick Action Valves are in-line taps or ball valves that join to low density poly pipe using a barbed spigot on one end and male threaded on the other and are used in low pressure situations (up to 300kpa)

Air is automatically vented if the cap is kept in this position

please see our smaller sizes

Caleffi Brass Air Relief Valve Fitting:CALEFFI 15MM (1/2") MI BRASS AIR RELIEF VALVE With an open impellerThese automatic air vents eliminate residual air in heating and air conditioning systems without the need for manual intervention. This prevents undesired noise, wear of devices in the circuits and inefficient performance of heating units. Installation Air is vented from the system by turning the plug on the air outlet anticlockwise by one complete turn from the fully closed position. Air is automatically vented if the cap is kept in this position. It