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dog193 01-09-2008 09:58 PM

Water heater hot outlet union leaking
Outlet has a 3/4 nipple screwed in, then a 3/4 metal (appears to be galvanized) union going into another 3/4 nipple soldered to copper piper.
Water started leaking from the union today. Tonight I disconnected, cleaned and used teflon tape on the threads of the union but it still leaks after two attempts.
Other than replacing the union are there any other suggestions?
Should I be using pipe dope instead of teflon tape?
Thanks in advance,
Jay in Illinois

tubguy 01-09-2008 10:46 PM

Exactly where is the union leaking. Where the two halves go together or on either side?

dog193 01-09-2008 10:56 PM

It's leaking around where the big nut joins the two pieces together, water is coming up through the threads.

Bondo 01-10-2008 06:14 AM


Those fittings seal against their Faces,... No need for Tape or Sealant.....

My 1st Guess is,... Your's has corroded or rusted,+ Probably needs to be Replaced.....

tubguy 01-10-2008 09:07 AM

It is odd that it started leaking out of the blue. You could try using pipe dope on the threads and use 2 big wrenches to tighten things back up. Hope it works.


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