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 VP50-100 Ventapipe 50 Air Admittance Valve
Dual fit synthetic rubber finger seal outlet for 3" or 4" soil pipe
Incorporating 2" outlet
For 4"/110mm soil pipe push over rubber seal, for 3"/75mm soil pipe push in to rubber seal
Can be used with: 2", 3" or 4" pipe
Complies with standard: BS EN 12380:2004
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