1-1/2 inch Tuuber Vent 2x Superior Seal Air Admittance Valve
air admittance valve is the only patented dual sealing air admittance valve that offers 2x the superior seal to prevent sewer gas and odors from escaping into a home or building.
The valve opens to satisfy negative pressures that can develop in the plumbing drain system when the fixture begins to drain allowing air to enter the drain system. The valve two seals are close by gravity at zero (0) differential pressure, and under positive internal pressure and in low-pressure conditions.
The valve can be used in new or existing applications as a secondary vent alternative to a vent extended to the roof.
