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  • ASSE
    ASSE 1049-2021 - Individual and Branch Type Air Admittance Valves for Chemical Waste Systems
    Edition: 2021
    $47.25
    per year

Content Description

Individual and Branch Type Air Admittance Valves for Chemical Waste Systems (AAVCs) are devices used in chemical waste systems to prevent the siphonage of trap seals. These devices do not relieve back pressure; they only allow air to enter the system. These devices are designed to be used for individual fixtures or for a horizontal branch serving multiple fixtures. When the devices are installed in a building, there shall be at least one (1) open vent terminal to relieve positive pressure which extends to the atmosphere outside of the building serving the same building drain on which these devices are installed. These devices shall not be installed in an area with a constant air pressure differential greater than

About ASSE

ASSE, the American Society of Sanitary Engineering, is a nonprofit organization that develops and publishes standards aimed at preventing unsanitary design in plumbing systems. Headquartered in Westlake, United States, ASSE standards contribute heavily to the IAPMO Uniform Plumbing Code, the overarching standard for plumbing in the United States. With 70 member companies and many more individual members, ASSE work promotes the prevention rather than cure philosophy.
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