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Posted by RayV on February 16, 2007, 9:25 am
wrote:
> Hi everyone,
>
> I redid some plumbing in my basement and it went well except for one
> thing:
>
> I can NOT get one area to stop dripping. It's a spot in a hot water
> line to the shower where I joined 1/2 inch
> CPVC to 1/2 inch copper. I used a male, threaded CPVC fitting into a
> female, threaded copper fitting.
> I used pipe dope and tightened it as much as I could. Any more tight
> and it probably would break.
>
> I have redone this fitting three times and it just won't seal, always
> drips. As I said, I used pipe dope one time.
> One time I used teflon tape. I was told that both of these are ok to
> use in this situation.
>
> Now, oddly enough, when I take a shower and the pipe gets good and
> hot, it stops dripping.
> When it cools, it starts again as if the expansion was sealing it.
>
> I'm out of ideas.
>
> Help?
>
> Thanks
Whenver I need to thread two parts together I put them together with
nothing on them and tighten them up. Then I take them apart and apply
tape or dope (gas lines). This helps clean and straighten any
irregularities in the threads. You may need to insert a metal male
piece into the copper to clean/straighten the threads. Then use a new
male CPVC fitting with tape.
Could be that the CPVC fitting is bottoming out before the threads can
get tight. Check this and trim a little off of the end if this is the
case.
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