Allows the free entry of air into the sanitary pipework system without the foul gases escaping into the building. Avoids the need to penetrate outer roof shell. It is recommended that air admittance valves are not used externally as environmental debris...

Fitted with environmental mesh to allow external installation. uPVC Construction Push-Fit Connection 30.8Ltr/sec Air Flow Capacity Domestic / Commercial Demountable & Reusable

Used for venting soil stacks allowing the soil stack to be terminated outside the home. Allows the free entry of air into the sanitary pipework system without foul gasses escaping. Fitted with environmental mesh to allow external installation. Demountable...