Home>Discussions>PLUMBING>Is thread sealant needed for PVC ?
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sodian
Is thread sealant needed for PVC ?

Is there any need to use thread sealer on a PVC fittings? I am transitioning from 1 1/2 inch copper pipe to PVC. The sweated fitting is threaded along with the PVC adapter. If a sealant is required what type would it be?
Thanks
Steve

Debra
Re: Is thread sealant needed for PVC ?

It is necessary, the gaps between the thread will leak no matter how tight you might get it. I used teflon plumbers tape when I put together fittings for my pool set up.

A. Spruce
Re: Is thread sealant needed for PVC ?

Teflon tape is the ticket. Paste sealants are ok as long as they're rated for plastics or else they attack the chemical bonds of the PVC, making it brittle over time.

goldhiller
Re: Is thread sealant needed for PVC ?

As pointed out...teflon tape is the safest way to go.

A few wraps of the white stuff should do the deed. Apply in a clockwise fashion as you face the open end of the threaded male fitting.

(If you apply it in the wrong direction, it'll get "unthreaded" as you put things together and won't do any good.)

sodian
Re: Is thread sealant needed for PVC ?

Thanks everyone for the quick reply's.:)

Steve

misfitter
Re: Is thread sealant needed for PVC ?

3 wraps of teflon tape and a smear of pipe dope.

i.m.plummin
Re: Is thread sealant needed for PVC ?

Most manufacturers recommend PTFE tap only. But I agree with Misfitter. I mostly use Rectorseal T+2 because I like the permanently soft set. And its okay on everything, even liquid fuel piping.;)

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