Dryer vent thru concrete steps
I just purchased a home and was cleaning up when I noticed my dryer vent had an excessive amount of lint. So I started taking the vent pipe apart in the basement and just about the entire pipe was full of backed up lint...I am talking about 15ft of vent pipe (I can't believe the place didn't burn down for the old owner).
The pipe goes thru the rim joist at the back of the house and then into poured concrete steps and then a 90 degree turn out the side of the steps (parallel with the back of the house). The problem is...the vent pipe was placed in the concrete steps, the rest of the concrete was poured on top and the pipe buckled under the weight. So at the 90 degree turn there is about a .5" x .25" hole, instead of the 4" which the pipe was originally!! There is about 1 foot of vent from the rim joist to the turn.
So I had two thoughts for a fix...one get a hammer drill with a foot long chisel and start widening the hole...or two just plug this hole and redirect the pipe away from the steps. Is there any chance option one might actually work? Any other ideas, thoughts, recommendations??
Thanks for the help.