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Oops301
Wrong cement on PVC ABS joint

Nope, don't ask how this happened, but I applied PVC primer and then PVC cement to a PVC toilet flange going into a black ABS pipe in my new upstairs bathroom remodel job. Yes I had a can of multiuse cement in the shop! Since it is directly above a new Sheetrock ceiling I am concerned about leaks. Does anyone have experience with a situation like this? Any way to get the joint apart or cut the PVC pipe out and try again?

Thanks,

dj1
Re: Wrong cement on PVC ABS joint

Well, s--t happens. Cut the ABS below the mess and re-do it, using all new parts. Check the label on your multiuse cement, it must say: for ABS, PVC and CPVC. I hope you still have an easy access from below.

Just a note: make sure the flange is high enough to be flush with whatever finished floor you will install in the bathroom. Good luck.

Fencepost
Re: Wrong cement on PVC ABS joint

A "ram bit" can be used to drill the plastic pipe out of a fitting.

Chief
Re: Wrong cement on PVC ABS joint

I did the same thing several years ago. Since my house is on a high crawl space I went underneath and cut the mess out and redid it. My wife helped from above and no problem.

dj1
Re: Wrong cement on PVC ABS joint
Fencepost wrote:

A "ram bit" can be used to drill the plastic pipe out of a fitting.

Ram bits are excellent, when there is no other alternative, as last resort. For the not so skilled, it might be a little too pricey, and also something that he will never use again.

johnjh2o
Re: Wrong cement on PVC ABS joint

Ram Bits aren't that expensive. He could spend more on fittings then the cost of the bit.

http://www.buycheapr.com/us/result.jsp?ga=us14&q=pasco+ram+bit

john

dj1
Re: Wrong cement on PVC ABS joint

Replacement parts:

1 - 3" coupling
1 - 3" toilet flange

Total: less than $10 plus tax (retail)

A new 3" ram:

From $43 to over $52, plus shipping and plus tax to many states.

Damage caused by an unskilled homeowner, plus the cost of calling a plumber after that: priceless (the sky is the limit).

Just comparing.

johnjh2o
Re: Wrong cement on PVC ABS joint

Your overlooking the fact that to cut the line and replace the pipe and fittings he would have to open the ceiling on the first. And being that the piping is between the floor joists, chances are he doesn't have enough room to get a coupling between the ell and the flange.

John

Mastercarpentry
Re: Wrong cement on PVC ABS joint

So long as a coupler can be installed, redoing the connection is easy- even for the average "Joe Homeowner". Instead of a specialty tool, use a dremel-type tool to cut the pipe from the inside. Cheap ones lack power but will work with some patience. Even with the new plumbing parts added on this is still under $50. One thing I would try first is to see if I could twist the connection apart without breaking anything downstream. If the glue connection is truly bad it might just pop apart, making the repair easy. If you're careful and bold you might be able to make a couple cuts parallel to the pipe on a fitting then split the fitting off. Just be absolutely sure to not nick the pipe underneath enough to cause a future leak.

Phil

johnjh2o
Re: Wrong cement on PVC ABS joint

The line is between floors and there is not enough room for a coupling between the fitting under the floor and the flange.

John

Oops301
Re: Wrong cement on PVC ABS joint

I tried two tests, one glueing a PVC pipe and ABS coupler with the PVC primer and cement, and another with the multipurpose cement with the intention of trying to get them apart and experiment. After 24 hours, both were stuck together tight. I then tried the Dremel tool idea and it worked pretty good, but I had to cut small sections and peal them out. They came out hard on both glue ups. The ABS pipe was smoother inside after removal with the PVC glue but still seemed pretty securely attached. I think I will play some calming music and cut it out with the Dremel tool. It would require spoiling the new floor covering and floor sheathing, or tearing up the new Sheetrock to replace the fittings. Bet I don't make this mistake again!

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