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-   -   Getting pipe dope off PVC (http://www.diychatroom.com/f7/getting-pipe-dope-off-pvc-155760/)

haddonfield78 09-04-2012 12:12 AM

Getting pipe dope off PVC
 
Hi all-
A couple days ago I boobed and used pipe dope on some threaded PVC fittings on my sprinkler manifold. They are all leaking now. Anybody know what will remove this stuff from the fittings without damaging the PVC? I'm gonna try to clean it up, prime it, glue it. Hope that works. Thanks to anyone that replies.
- Greg

ddawg16 09-04-2012 06:30 AM

Just use a rag and wipe it off. Depending on the type used, water should disolve it.

Then use about 4 wrapes of teflon tape. The tape is not what seals it...but rather reduces the friction of the threads and lets you get it tighter.

user1007 09-04-2012 06:36 AM

Quote:

Originally Posted by ddawg16 (Post 1002834)
Just use a rag and wipe it off. Depending on the type used, water should disolve it.

Then use about 4 wrapes of teflon tape. The tape is not what seals it...but rather reduces the friction of the threads and lets you get it tighter.

Ditto! Definitely use teflon tape for your connections. You do not want to glue threaded fittings.

bob22 09-04-2012 06:58 AM

Most pipe dope is fine for PVC threaded joints; check fine print of your pipe dope container to see if recommended. If so, just wrap some teflon tape 3x's around and reinstall. Using both is many times better than either alone.

DangerMouse 09-04-2012 07:17 AM

Using fast-drying glue on threaded pvc joints may cause more problems than it solves!

DM

Alan 09-04-2012 09:22 AM

Glue softens the plastic to allow them to mold together. If you put that on threads, i bet you can guess what is going to happen.


:wink:

haddonfield78 09-04-2012 10:32 AM

I wasn't planning to unscrew the fittings. I was gonna clean off the dope, PVC prime and PVC glue circumferentially at the fitting. Check out the pic. See how all the valve pipes are on top of each other? I don't think I can unscrew em. If my plan doesn't work I'll have to cut the pipes and start over.

haddonfield78 09-04-2012 10:34 AM

1 Attachment(s)
The leaks are where the PVC elbows attach to PVC couplers

ddawg16 09-04-2012 10:54 AM

Quote:

Originally Posted by haddonfield78 (Post 1002974)
I wasn't planning to unscrew the fittings. I was gonna clean off the dope, PVC prime and PVC glue circumferentially at the fitting. Check out the pic. See how all the valve pipes are on top of each other? I don't think I can unscrew em. If my plan doesn't work I'll have to cut the pipes and start over.

I can tell right now that your plan will NOT work. PVC glue will not seal up thse leaks from the outside. It might work for one day....but pvc moves arond a lot with temp. It won't be long before it leaks.

Save yourself some time....do it right now....

haddonfield78 09-04-2012 10:59 AM

DDawg
Thanks man! I was hoping that was what someone was gonna tell me.


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