An item that does exactly what it says it will, the McAlpine Air Admittance Valve is a valuable addition to any of your bathroom fixtures and fittings.
McAlpine VP1 Air Admittance Valve with 1½" BSP Thread Outlet
Ventapipe 25 air admittance valve with 1½" BSP thread outlet
Complies with standard: BS EN 12380:2008
For use in above ground drainage systems to provide a means of ventilation under conditions of reduced pressure when ventilating pipes are terminated inside buildings in accordance with BS EN 12056-2:2000