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snrusnak 05-30-2013 10:22 PM

Any plumbers here?
I've trying to plumb up a shower valve and can not get the threaded fitting from the cpvc to the brass valve to not drip. I've redone it 3 times now. I have done some other plumbing projects, some copper, some cpvc, and a good amount of pvc, and never really had any issues. This one is kicking my butt.

First time both the hot and cold supply dripped at the threaded fitting. I redid it with more teflon tape(I'm using tape only...have never tried dope), then second time the cold was good and the hot supply dripped at the same spot but slower. I did that side a 3rd time with even more tape(we're talking about ~7 wraps now) and I think it's still leaking. It seemed dry at first but after about 1-2 hours I went back and there was a little water there, although not enough to form a drip. I wiped it all dry and will see if it comes back.

I'm at a loss....

Here's pics of what I"m dealing with. I'm also using the preferred composite fittings(not all plastic)

Joekrooz 05-30-2013 10:42 PM

I'm not a plumber but I do a lot of irrigation repairs and the occasional plumbing job. Try using 2-3 wraps of Teflon, in this case more is not better. If that doesn't work try 2-3 wraps of Teflon with the blue brush on thread sealer. Good luck.

snrusnak 05-30-2013 10:46 PM

I started with ~3 wraps. It leaked bad(fast drip). Then went to ~5 wraps and the cold side stopped but hot still leaked. Went to ~7 wraps and I think the hot is still leaking.

I'm thinking about trying pipe dope. Not sure if I should just redo all the fittings with it though...

Joekrooz 05-30-2013 10:49 PM

Not to be a wise guy but you are wrapping clockwise around threads. Sorry I gotta ask!

snrusnak 05-30-2013 10:50 PM

Yes I'm wrapping in the same direction as the threads, so when I tighten the fitting it goes with the tape, not against it.

Joekrooz 05-30-2013 10:54 PM

I figured that, you never know. That would frustrate the hell out of me. Maybe someone else can give some better advise. Sorry I couldn't help you.

snrusnak 05-30-2013 11:00 PM

I appreciate the help. I've never fought a leak like this. I'm considering soldering copper off the valve then using threaded adapters to the cpvc. But that's still a threaded connection...

I'll probably try pipe dope. 4th times a charm??? lol

70x7 05-30-2013 11:57 PM

dude, you need the pipe dope. teflon is only good for so much...

RedSmart 05-31-2013 01:17 AM

I'm not a plumber either, but I had a similar problem that took me forever to figure out.

My problem was that my brass fittings had a burr (looks like someone cross threaded them at Ho Depot), and I didn't notice until I installed them.

In the end I had to replace the fittings with new ones, and all was good in the end.

Sorry can't be more help, but just a suggestion.

seanbeckaroo 05-31-2013 08:14 AM

Use pipe dope, and get some new fittings. Those Lowes/Home Depot fittings are usually crap. I use shark-bite now, a little more money, but you don't have these problems :)

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