This Oatey 39016 Sure-Vent Air Admittance Valve (AAV) provides a 20 DFU capacity for venting DWV systems up to 2 inches. Designed to allow air into the plumbing system while preventing sewer gases from escaping, it features Sweet Spot technology that opens at -0.01 psi and seals at 0 psi. The unit includes a 1-1/2" x 2" PVC Schedule 40 adapter and is functionally tested for reliable performance in secondary venting applications

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