How to Install an Air Vent Valve

What You'll Need
Air vent valve installation kit

An air vent valve is used to control the flow of air through a system. If you have an air vent valve which need replacing, or simply wish to install one in a new duct ventilation system, then this can be done in a matter of minutes with the right expertise. Putting an air vent valve in takes some time and effort, even for someone who has previous DIY experience.  If you are a beginner in home improvement techniques, then you may have more trouble getting the air vent valve to install correctly, but by following a few simple tips you can get the job done quickly and easily.

Step 1 - Removing the Vent Cover

In order to install the air vent valve, you will need to be able to get at the air vent itself. Remove the cover by using your screwdriver to take out the nails or screws which are holding it in place. You should then be able to extract the cover, assuming it has not been caulked in to place. If there is caulking, then you can use a chisel, or even the edge of your screwdriver, to remove enough of the caulk to allow you to pull off the cover.

Step 2 - Taking Out the Vent

Put on a pair of safety gloves, and remove the vent from its surroundings, You should be able to see within the ventilation system a series of pipes and connections. Using the manual from your AC unit, make a note of which pipe the vent serves, and then remove this from the vent using your screwdriver.

Step 3 - Fitting the Air Vent Valve

Remove the vent valve from its packet. You should have a series of installation instructions with the valve, which usually apply to HVAC unit installation. With your wrench, unscrew the bolt at the base of your pipework, as marked on the diagram in your instructions. As air conditioning duct work is different for each model, you will have to examine your AC unit to discover exactly where the valve should go. Take the pipe which connects to the vent, and undo the bolt at the base. Connect your valve nut to this base, and tighten up again.

Step 4 - Tightening the Valve

Once you have the valve in the pipe, attach it to your AC unit chimney, making sure that the bolts are tightened so that they hold the valve without leaks. You need to tighten the bolts slowly and gradually to ensure that they are not cracking the valve. Once they are in tightly, cover the ends of the connections with a layer of caulk.

Step 4 - Finishing Up

Once you have completed the valve installation, position the pipe against the hole for the air vent, and then caulk that into place. Put your air vent over the top, and screw down into position. Make sure that the vent is tight against the pipe, and then cover the edges of the vent with caulk. Leave to dry.