Auto Vent

Air admittance vents and auto vent boxes for drain systems. The collection includes Sioux Chief OxBox auto vent boxes in 1-1/2" and 2", in ABS and PVC glue connections, and an Oatey 1-1/2" NPT black ABS in-line air admittance vent.

Match the pipe size and material, ABS or PVC, and the connection type, glue or threaded. An auto vent box lets the valve sit in the wall behind an access grille. Check local code before using air admittance valves, as some jurisdictions limit where they are allowed and require them to remain accessible.

See also: auto vents, ABS DWV fittings, PVC DWV fittings.