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The OATEY COMPANY 39239 is a Sure Vent Air Admittance Valve (AAV) Kit rated at 6 Drain Fixture Units (DFU) and packaged with a tubular adapter for straightforward installation. Air admittance valves allow one-way venting of drain lines without the need for a secondary vent pipe run through the roof. The kit is designed for use within the scope of model plumbing codes and referenced standard installation guidelines. Licensed plumbers install this assembly where traditional secondary venting is impractical or cost-prohibitive. The kit ships as a single valve with the necessary tubular pieces included.
This AAV kit is well suited for island sink installations and remote bathroom applications where extending a conventional vent stack is not feasible. It provides a code-compliant venting solution that controls sewer gas and maintains proper drain flow by allowing air in while blocking gas from escaping back into the living space. It is intended for residential and light-commercial drain, waste, and vent systems operated within the limits of applicable model plumbing codes.
Designed as an OEM-style replacement and new-installation AAV for residential and light-commercial drain, waste, and vent systems where model plumbing codes permit the use of air admittance valves in lieu of secondary venting.
Installation should be performed by a licensed plumber in accordance with the applicable model plumbing code and referenced standards included with the kit. Shut off water supply and ensure the drain line is depressurized before beginning work. The valve must be installed in an accessible location at or above the flood-level rim of the fixture it serves, per standard AAV installation practice. Do not install in an airtight enclosed space, as the valve requires access to an air supply to function correctly.
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