Air Admittance Valve Push-fit Black 110mm Floplast AF110

Air admittance valves allow the free entry of air into the sanitary pipework system without the escape of foul gasses into the building.  Wehen installed into sanitary pipework (provided systems confirmorm to BS EN 12056:2000) the valve not only prevents the loss of water from trap seals due to induced siphonage, but also has the added advantage of providing an early warning indicator to a potential blockage.
Please see attached leaflet for further information and fitting instructions.