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Dryer Vent Cap replacement help.

Posted by rysox (My Page) on
Thu, Oct 18, 07 at 17:41

I purchased a standard 4' dryer vent cap repalcement with the louvered flaps to replace a damaged one. I cannot insert the thing into the existing 4" opening (metal duct 4" duct) THey both seem to be exactly the same size.

I cannot find a repalcement cap that about 3 3/4" or 3 1/2"?

I tried altering the 4" cap and that didnt work either.
I also tried using metal duct adapter piece but still with it, I cannot get new vent cover to sit flush with wall.

What can I do to replace?

Follow-Up Postings:

RE: Dryer Vent Cap replacement help.

The plastic cap has a recess that the metal duct goes into. The duct usually has protrusions all around the circumference at the end that keeps the duct firmly in the cover. The duct needs to be circular not an oval to insert it. It might be easier to buy the cover with the duct and replace it as a unit.

RE: Dryer Vent Cap replacement help.

Thanks Ron for the response.

I do not have access to the inside ductwork to replace the cover with one of those cover duct unit jobs your mentioning. The duct run at the back end of a crawl space.

RE: Dryer Vent Cap replacement help.

What you need to do is purchase the hand tool that makes crimps in duct pipe. Crimp the end that you can get to then the dryer cap replacement will slip on.

Here is a link that might be useful: pipe crimper

RE: Dryer Vent Cap replacement help.

If I am able to get in the back of the crawl to fix it, would my idea be an acceptable fix.

Duct runs about 30-40 feet to out the wall termination. I would cut existing ductwork at the termination. Feed new vent cover unit in. Connect existing rigid duct with new vent cover unit with duct tape.

Is using duct tape a bad idea at the very end of this exhaust run?

RE: Dryer Vent Cap replacement help.

Use HVAC foil tape instead of duct tape. Duct tape is used on everything but ductwork. The foil tape is available at the big box stores in the tape section.

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