Air Admittance Valves are Allowed!!

As we all know, the use of air admittance valves (AAV) has been a hot topic. In Appendix E, "Special Design Plumbing Systems" (E.8), the National Standard Plumbing Code (NSPC)/2009 allows the installation of AAVs when the system is designed by a licensed design professional.

The following are two excerpts from the New Jersey State Uniform Construction Code Act (N.J.S.A. 52:27D- 119 et seq.) pertaining to the use of new products in construction:

N.J.S.A 52:27D-120.a, Purpose, states: "To encourage innovation and economy in construction and to provide requirements for construction and construction materials consistent with nationally recognized standards."

N.J.S.A. 52:27D-120.d states: "To eliminate restrictive, obsolete, and conflicting and unnecessary construction regulations that tend to unnecessarily increase construction costs or retard the use of new materials, products or methods of construction, or provide preferential treatment to types or classes of materials or products or methods of construction."

The International Code Council (ICC) Evaluation Service (ES) report PMG-1025 was recently revised (July 27, 2012) and now specifies that AAVs that are in compliance with the listed standards are deemed to be in compliance with the NSPC/ 2009 and 2012. The standards are: ASSE 1050-2009, Performance Requirements for Stack Air Admittance Valves for Sanitary Drainage Systems, ASSE 1051-2009, Performance Requirements for Individual and Branch Type Air Admittance Valves of Sanitary Drainage Systems – Fixture and Branch Devices and NSF Standard 14-2010, Plastic Piping System Components and Related Materials.

N.J.A.C 5:23-3.7, Municipal approvals of alternate materials, equipment, or methods of construction, requires the enforcing agency to approve materials, equipment, or methods of construction that are approved by ICC ES reports. Therefore, AAVs that comply with the standards listed in the ICC ES report are permitted to be used in one- or two-family dwellings and Class III structures without a design professional's seal. This does not apply to any Class I and Class II commercial projects, which require a design professional's seal under the Building Design Services Act.

AAVs must be furnished and installed in compliance with NSPC Appendix E.8, the ICC ES report, and the manufacturer's installation instructions.


Thomas C. Pitcherello
Code Assistance Unit
(609) 984-7609

Construction Code Communicator, Volume 24, Number 3, Fall 2012 (PDF)