List of featured suppliers of AIR ADMITTANCE VALVES Soil and Waste BS EN 12380:2002 Kitemark on Building Products Index
Air admittance valves are devices designed to prevent the entry of foul smells and gases into a building's drainage system. These valves work by allowing air to enter the system when necessary, but preventing the escape of gases and odors. The bs en 12380:2002 kitemark is a certification mark that ensures the air admittance valves meet specific safety and performance standards for soil and waste systems.