Dryer Vent Cap replacement help.
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?