Keeney 46WK 1-1/2-Inch or 1-1/4-Inch by 1-1/2-Inch Straight Extension Coupling Trap Adapter, White

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 in the piping system.The purpose of an Air Admittance Valve is to provide a method of allowing air to enter the plumbing drainage system without the use of a vent extended to open air and to prevent sewer gases from escaping into a building. An Air Admittance Valve is a one way valve designed to allow air to enter the plumbing drainage system when negative pressures develop in the piping system. The device shall close by gravity and seal the vent terminal at zero differential pressure (no flow conditions) and under positive internal pressures.

Sure-Vent air admittance valve installation pack
Use as an alternative to a secondary vent in a DWV system
Vents up to 20 DFU Branch or 8 DFU Stack
Includes AAV, P-trap, 6 in. extension tube, PVC threaded adapter and deep box flange
One size approved to handle up to 2 in. vent pipe
Sure-Vent air admittance valve installation pack
Use as an alternative to a secondary vent in a DWV system
Vents up to 20 DFU Branch or 8 DFU Stack
Includes AAV, P-trap, 6 in. extension tube, PVC threaded adapter and deep box flange
One size approved to handle up to 2 in. vent pipe

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Oatey 39239 8 Stack DFU Capacity Installation Kit with Tubular Adapter Air Admittance Valve, 1.5 in. 20 Branch, White;