products provide an innovative and practical way of venting plumbing drainage systems, preventing the loss of water seals in traps without the need for costly roof penetration and vent piping. With over thirty years of expertise, is the world's only specialist manufacturer of Air admittance Valves (AAVs). The company is committed to supporting the plumbing industry and works closely with international standards bodies and testing institutes.
products provide an innovative and practical way of venting plumbing drainage systems, preventing the loss of water seals in traps without the need for costly roof penetration and vent piping. With over thirty years of expertise, 
is the world's only specialist manufacturer of Air admittance Valves (AAVs). The company is committed to supporting the plumbing industry and works closely with international standards bodies and testing institutes.