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Phil, Mechanical Engineer.
Category: Plumbing
Satisfied Customers: 8511
Experience:  Retired mech. contractor, shop owner, 51 yrs experience.
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2ND OPIONION...accidently put two small holes into a

Customer Question

2ND OPIONION Request...I accidently put two small holes into a wall and forgot there's a 3 inch drain PVC pipe behind. I had a plumber come out; he cut a hole in the wall; cut a small section (location of nail holes), then added a 6 inch piece of 3 inch PVC pipe and secured
it with two 3 inch rubber couplings. The problem--there isn't a lot of room to put new drywall back. I'm thinking there is 1/8 of inch space around the rubber coupling. I noticed that a plastic 3 inch coupling is not as thick as the rubber coupling and would
add 1/16-1/8 inch of space. Is there another solution to this problem where I could get the drywall installed? I texted a picture of the pipe to a plumber I've used in the past and he indicated that there's another way to fix it, but he would not tell me.
Submitted: 2 years ago.
Category: Plumbing
Expert:  Phil replied 2 years ago.
Hello, welcome to Just answer.
The other way to fix it is called a 'repair coupling' there are various types, I will mark the thinnest on on the screen shot below.
It sounds so far like a vent pipe, with no water in it. Some of us would have used stainless steel wood screws about 1/2" long to plug the holes with a dab of urethane roof sealant under the heads of the screws and a big dab over the top of screw head. That would be legal in some jurisdictions for vent pipe, and maybe not in others.
its too late for that now however.
We are on the honor system here. Please remember to rate my service before you leave today. If you need anything else, just let me know. You can continue asking follow-up questions at no additional charge.
Customer: replied 2 years ago.
Thanks Phil! See the attached picture. This is the job I paid another plumber to do, but as you can see, there's only 1/8 of an inch of space for Drywall...not a lot.
Customer: replied 2 years ago.
Based on what is shown in the picture, should I have the plumber return; remove the rubber coupling and install the plastic 3 inch pvc coupling, which is a little thinner than the rubber coupling? This should give me an additional 1/16th - 1/8 of an inch. This should give me close to 1/4 of an inch of space for drywall, which I can have an drywall expert manipulate (shave down in area of coupling) and install.
Customer: replied 2 years ago.
No worries...I will rate an excellent...I always do.
Customer: replied 2 years ago.
The first guy that answered my question was great and I rated him excellent. Since I signed up for the premium service, I decided to get a second opinion.
Expert:  Phil replied 2 years ago.
Hello again, I have not seen the first answer.
If you can push the PVC back with only modest pressure, an 1/8" or more, you can then cut out the space between the studs and fit these heavy steel straps in place after pushing the pipe back. then nail them in place. cut a recess into the studs so that the straps are flush.
If the pipe moves easily you only need one strap in the middle
Here is a screen shot of that.
Let me know what you think, we can go from there.
If you need anything else, just let me know. You can continue asking follow-up questions at no additional charge.