How To Replace A Dryer Vent Hose Inside A Wall

A dryer vent hose collects moisture and transports it outside the home to keep the inside cool and dry for a cozy feel. When used with the washing machine, a dryer vent hose accumulates the moisture and dissipates heat outside. It prevents lint on the clothes too.

When the dryer vent hose gets damaged, lint will build-up inside it. National Fire Protection Association (NFPA) reports that lint accumulation is one of the major reasons for home fires starting inside the dryer hose.

Hence, whenever it gets damaged or clogged due to some reason, you must replace it. If you don’t know the process, help yourself with our guideline on how to replace a dryer vent hose inside a wall.

It will just take a few minutes to read the article and accomplish the replacing task. So, let’s get on with it.

How to Replace A Dryer Vent Hose Inside A Wall

Replace A Dryer Vent Hose Inside A Wall

U.S. Fire Administration reports that each year at least 2900 home fire outbreaks happen mainly because of the dryer vent hose. And it is attributed to the damaged vent tube. So, whenever you notice any damage or leakage on the vent hose for the dryer, you must immediately replace it.

The process is straightforward. It includes two steps-

  • Removing the existing dryer vent hose
  • Installing the new one

You will need-

  • Utility knife
  • Screwdriver
  • Jab saw
  • Foam insulation spray can
  • Silicone caulk

Step 1: Removing the existing dryer vent hose:

Although the vent hose on the washing machine dryer system seems a straightforward tool, removing it isn’t that easy.  You will have to be patient and work attentively to remove the damaged hose at first.

  1. Unplug the dryer at first. Keep it at a distance from the existing dryer vent and the wall too.
  2. Now use a screwdriver to loosen the clamp of the vent hose. Once the screws are loosened entirely, you can pull the hose firmly from the dryer vent. The dryer vent will extend from the wall.
  3. The original dryer vent will be attached to the wall using the screws on the beauty plastic ring. Use the screwdriver to remove the screw from the plastic ring. Once you have loosened the screws, pull the beauty plastic ring. Keep it and the screws in a safe place.
  4. In the gap between the wall and the dryer vent, there should be spray foam insulation. Look for it and ensure its presence. Your dryer vent hose replacement will be made difficult if the original dryer hose installation has spray foam insulation.
  5. Find the exterior dryer vent hood on the wall. There you will find caulk used to protect the hose. Use a utility knife to cut the caulk. You should do it carefully so that you don’t damage the wall in the cutting process.
  6. Now, you will have to find the screws that hold the vent hood with the wall. Use the screwdriver to loosen the screws on the vent hood.
  7. You don’t have to discard the vent hood screws entirely. Pull the vent hood from the exterior wall by holding it firmly. Make sure the screws are attached to the hood.
  8. You will find to pull the vent hood from the exterior wall if the original dryer vent hose installation has used the spray foam insulation. In this case, use your muscle power and the power tool to remove the foam insulation manually.
  9. You will need a jab saw to remove the foam insulation from inside the wall. Before you use the jab saw, you must wear gloves to protect your hands. The jab saw should be between the wall and the vest hose. Cut through the foam insulation using the jab saw.


If you find it challenging to cut through the foam with the jab saw, use a tin snip to cut the vent hose insulation.

  1. Once you have cut through the vent hose insulation, grab one side of it with the pliers. Firmly pull the vent with your muscle power. Keep pulling the dryer vent until the insulation foam releases it.
  2. Once you have removed the insulation from the vent hose, grab the hood. After that, pull the vent away from the inside wall. If there’s any foam insulation inside it, scuff it off with a utility knife.

Step 2: Replacing the old hose with the new one

Now, you will have to insert the new vent hose inside the wall and mount it properly. The steps follow as-

  1. Find the hold in the wall and push the replacement vent hose inside it. Now, attach the new vent hood with the wall. You can use the old screws used in the earlier vent hood.
  2. Use utility shears to cut the silicone caulk. You don’t need much of it. So, cut only the tip in a cube formation. Apply a bead of the silicone caulk around the gaps between the dryer vent hose and wall. It will prevent moisture from seeping into the wall and vent hose.
  3. Now you will have to insert the applicator. It should be fixed between the replacement hose of the dryer vent and its adjacent wall. The spray foam insulation will extend its size once sprayed. So, keep the spatial matter in your mind.
  4. Once the foam insulation has been fixed properly, attach the plastic beauty ring to the dryer vent hose. Use the screws to secure the dryer vent hose.

That’s it, and you have successfully replaced the damaged dryer vent hose inside a wall.

Final Talks

You won’t need more than 10 to 15 minutes to replace a dryer vent hose inside a wall. Nonetheless, you will have to be cautious to remove the old vent hose and replace it with a new one. You shouldn’t damage the dryer in the process.

Moreover, when you spray the new foam insulation, make sure it doesn’t exceed the space as it doubles the size after spraying. The next time you run the machine, test that your dryer vent hose is working correctly.

About Lynne Sadowski

I have been working as a sales man in a hose pipe shop for the last few years. During this time I have gained enough knowledge about hose pipes which I have tried to highlight on this site. Hopefully I can solve all your problems with hose pipe as well as suggest the best product.