2-inch wall box air admittance valve

Engineering Specification: The intended purpose of an air admittance valve is to provide a method of allowing air to enter a plumbing system as an alternative to a vent extended outside a building to outside air and to prevent plumbing system sewer gases from entering inside a building and to protect against siphonage of a plumbing fixture trap. 

 

 

Code Approvals: 

International Plumbing Code (IPC) 

International Residential Code (IRC) 

Uniform Plumbing Code (UPC Section 301.2) 

 

 

Standards Compliance: 

ANSI/ASSE 1050 (stack type) 

ANSI/ASSE 1051 (individual fixture & branch type)