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Step 6 · Install the AAV

The final step is to attach the AAV itself. Most AAVs come with a threaded adapter. First, glue this adapter to the top of the vertical pipe you just installed. Apply primer and cement to the outside of the pipe and the inside of the adapter's socket, then push it on with a quarter-turn. Once the adapter is set, simply screw the Air Admittance Valve into the threaded opening. Hand-tightening is usually sufficient; do not overtighten with a wrench, as this can crack the plastic.

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Step 6 · Install the AAV

The final step is to attach the AAV itself. Most AAVs come with a threaded adapter. First, glue this adapter to the top of the vertical pipe you just installed. Apply primer and cement to the outside of the pipe and the inside of the adapter's socket, then push it on with a quarter-turn. Once the adapter is set, simply screw the Air Admittance Valve into the threaded opening. Hand-tightening is usually sufficient; do not overtighten with a wrench, as this can crack the plastic.

Tools and Materials

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How to Install an Air Admittance Valve (AAV)

Step 6 of 7·40 min left

Preparation and Safety
15 mins3 itemsBeginner
Mark the Cut Location
10 mins3 itemsIntermediate
Cut the Drain Pipe
15 mins4 itemsAdvanced
Install the Sanitary Tee
20 mins3 itemsAdvanced
Attach Vertical Vent Pipe
10 mins6 itemsIntermediate
6
Install the AAV
10 mins4 itemsBeginner
7
Testing for Leaks and Performance
30 mins2 itemsBeginner
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