Plumb Shop 829-736 Automatic Air Admittance Valve 1.5 in

Product Description

The PLUMB SHOP DIV BRASSCRAFT 829-736 is a black plastic automatic air admittance valve (AAV) designed to vent drain lines without a connection to an open vent stack. It fits 1-1/2 inch OD drain tubing and uses a pressure-differential mechanism to admit air when the drain flows, preventing siphoning of the trap seal. When the drain is idle, the valve closes and seals, blocking sewer gases from entering the occupied space. Licensed plumbers install this fitting in residential drain systems where running a secondary vent through the wall or roof is impractical or cost-prohibitive.

The 829-736 is suited for residential plumbing applications including kitchen sink drains, lavatory basins, bathtubs, showers, and washing machine standpipes. It replaces any secondary plumbing vent on 1-1/2 inch OD drain tube connections, protecting the trap seal on fixtures in those locations. The compact footprint makes it a practical solution in tight cabinet or vanity installations where a traditional vent pipe cannot be easily routed.

Key Features

• Fits 1-1/2 inch OD drain tubing — no adapter required for standard residential drain lines
• Automatic pressure-differential valve admits air during drain flow and seals at rest to block sewer gas
• Black plastic construction resists corrosion in damp under-sink environments
• Replaces any secondary plumbing vent on compatible drain connections
• Compact item dimensions — 2 inches x 4 inches x 5.25 inches — fits in tight cabinet spaces

Compatibility

Designed to replace any secondary plumbing vent on 1-1/2 inch OD tube connections serving kitchen or lavatory basins, bathtubs, showers, and washing machines.

Installation Notes

Installation is performed by a licensed plumber in accordance with the applicable edition of the International Plumbing Code (IPC) or local plumbing code, which governs where AAVs are permitted. Shut off water supply and ensure the drain line is empty before working on the fitting. Air admittance valves must be installed in an accessible location and above the flood-level rim of the fixture being served per typical code requirements. Do not install in an enclosed, airtight space that would restrict the valve from drawing air.