Oatey 3 in. PVC Air Admittance Valve 6-64-639-03 Assorted colors of blue and

Assorted colors of blue and red

Opening Length: 2 in

Made with a heathered polyester front panel and a high-density lock-up logo

These are great for lining up all your screwdrivers

Sensitivity: 98 DB SPL@1 kHz

Oatey 3 in. PVC Air Admittance Valve 6-64-639-03 Assorted colors of blue andThe 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