Oatey 39225 Sure Vent Air Admittance Valve 6 DFU with White Tubular Adapter

The Oatey Sure Vent 6 DFU Capacity Air Admittance Valve is a one-way valve designed to allow air to enter the plumbing drainage system when negative pressures develop. This valve eliminates the need for a vent extended to open air while preventing sewer gases from escaping into buildings. It operates by gravity, sealing the vent terminal under no flow conditions and positive internal pressures, ensuring efficient drainage. • Complies with ASSE Standard 1050 and 1051 • Designed for use as a secondary vent • Approved for handling up to 2-inch vent pipe • Opens and closes as needed by the plumbing system • Made from durable polyvinyl chloride