Complies to ASSE Standard 1050 and 1051.;For use as a secondary vent.;One size approved to handle up to 4 vent pipe.;Opens/closes as needed by building's plumbing system.;Air admittance valve;For use as a secondary vent;Opens and closes as needed by building's plumbing system;Use as an air inlet source;One size approved to handle up to 4-Inch vent pipe

• Oatey 39220 2-Inch by 3-Inch Sure-Vent Air Admittance Valve 160 DFU with 2-Inch by 3-Inch PVC Schedule 40 Adapter, White
• 2"" - 3""
• 2-Inch

Oatey 39220 2-Inch by 3-Inch Sure-Vent Air Admittance Valve 160 DFU with 2-Inch by 3-Inch PVC Schedule 40 Adapter, WhiteOatey