ASSE Standard 1050-2009 Performance Req for Stack Air Admittance Valves for Sant
Description
Stack AAVs for Sanitary Drainage Systems are devices used in plumbing drainage systems to prevent the siphonage of water trap seals. These devices do not relieve back pressure; they only allow air to enter the system. They are designed to be installed on stacks where branches on multiple floors are connected. When these devices are installed in a building, there shall be at least 1 open vent terminal to relieve positive pressure which extends to the atmosphere outside of the building serving the building drain on which these devices are installed.
