Leaking threaded connection

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klm917

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I finished my project of replacing a run of old galvanized pipe with copper, and all my solder joints are working great - frustratingly, I have one threaded connection to hook up a hose bibb (for a future laundry connection) that is leaking ever so slowly. It's leaking extremely slowly right out of the bottom of the threaded connection and coming up to a drop only every few hours if that. If you look closely in this picture you can see a drop forming but it'll be a long time before it actually drops.

At first I tried teflon tape, and it was leaking faster, so I took it out and used Blue Monster pipe dope, and that time screwed it in more tightly, (an extra full 360 degree turn), but it's still leaking slowly. I've done a couple of threaded connections in my shower, water heater, installing a water hammer arrestor, etc, with just tape, and I've never had leaks.

I figure I have a couple options. Any thoughts on what you would do as experienced plumbers, to resolve the problem quickly & easily?

1. Take it out and try again with both Tape & Dope together
2. Try to tighten it another quarter turn (will be sideways but I guess that's OK)
3. Get a new hose bibb because I think the threads were kind of crappy
- This is the hose bibb I am using, I liked it because it is lead free but I'm not sure about these threads
4. Wait and see if minerals in the water plug up the leak.

Thanks!

Capture - Copy.PNG
 
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Jeff H Young

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is it that much work to unscrew tape, and dope and re install that you dont want to chance another drip? if so buy another hosebib and wrap with teflon around 5 wraps and dope the new one.
 

klm917

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Sometimes I get a little nervous putting all the tension on the pipes with all the tightening and untightening like something's going to break, especially since this one was pretty tight and there are a bunch of other joints right near it. You inspired me I just took it off and tried Tape & Dope. So far so good. I didn't tighten it as much this time either.

Probably a good reminder that it isn't all made of fine china.
 

klm917

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Wasn't planning on it - the horizontal copper pipe you see near the top of the picture is mounted to the wall in two places with copper bell hangers and it's really solidly in there.
 
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