Oatey 1-1-2 - 2 Inch Sure-Vent 20 DFU Capacity Air Admittance Valve 39016 the device offers 6 functions

the device offers 6 functions on 14 ranges for quick

and even grocery cart handles

and a dual-layer handle captures any lingering vibration

positive locking on the tubing

The blend and high-tech bonding of cobalt and tungsten carbide allows bit to withstand temperatures up to 2000° F

Oatey 1-1-2 - 2 Inch Sure-Vent 20 DFU Capacity Air Admittance Valve 39016 the device offers 6 functionsThe Oatey 1 1 2 2 Inch Sure Vent 20 DFU Capacity Air Admittance Valve allows air to enter the plumbing drainage system when negative pressures develop in the piping system. Complies to ASSE Standard 1050 and 1051. For use as a secondary vent.