How To Install An Air Admittance Valve Under Bathroom Sink

Air admittance valves (AAVs) are essential components of bathroom plumbing that allow air to enter the drainage system when necessary to prevent siphoning and trap seal loss. Installing an AAV under a bathroom sink is a relatively simple task that can be completed in a few steps.

The first step is to gather the necessary materials. You will need an AAV, a hacksaw, a screwdriver, and some Teflon tape. Once you have gathered your materials, you can begin the installation process.

The first step is to locate the drain pipe under the sink. The drain pipe is typically made of PVC or ABS plastic and is located directly below the sink drain. Once you have located the drain pipe, you need to cut a hole in it using the hacksaw.

The next step is to install the AAV. The AAV should be installed on the drain pipe using the screwdriver. Be sure to apply Teflon tape to the threads of the AAV before installing it to ensure a watertight seal.

Once the AAV is installed, you need to test it to make sure it is working properly. To test the AAV, run water into the sink and then turn off the water. The AAV should allow air to enter the drain pipe when the water is turned off to prevent siphoning and trap seal loss.

If the AAV is not working properly, you may need to replace it. AAVs are relatively inexpensive and easy to replace. However, if you are not comfortable replacing the AAV yourself, you should call a plumber.

Installing an AAV under a bathroom sink is a simple task that can be completed in a few steps. By following these steps, you can ensure that your bathroom plumbing is functioning properly.