Oatey 39012 In-Line Vent, 1-1/2 in

Replaces any secondary plumbing vent protecting the traps of kitchen sinks, bathrooms, basins, tubs, showers, washing machines, etc. Breaks siphoning action caused by draining water. The differential created by draining water automatically opens sealing disc and as drain flow stops, spring mechanism automatically closes sealing disc to keep water seal in trap constant and prevent sewer gas from escaping drain. MUST be located at least 6 above trap arm top. 13/16 thread.Mechanical vent installs on the drain line and vents the line without allowing sewer gas to enter the home

Mechanical vent installs on the drain line and vents the line without allowing sewer gas to enter the home

Helps prevent sewer gas from entering your home

Push to connect type of connection

Spring-loaded to open with negative pressure and close with positive pressure

NSF-24 listing for use in recreational vehicles