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Old 06-11-2016, 04:00 PM   #1
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HELP! Leaking hot water line '07 Flagstaff

Forgot to drain the water lines last fall and when I attached the water hose to the RV and turned it on I had water running out of the back around the drain lines holes. I pulled the rear cabinet cover off on the inside rear corner and noticed the hot water line is leaking (I can hear air 'till the water gets there) about two feet in from the very back. The problem is the line is run thru a piece of what looks like 1 1/2" aluminum square tubing that apparently runs (between the floor and the protective underbelly that is visible from underneath the RV) all the way up to around the fridge sink area. I first thought it would be one of the elbow's at the very rear but no luck. I have not seen PEX break from freezing all though I know it is possible. I did notice two small holes in the aluminum tubing where the hissing sound is and the water leaks through. These holes were made by a person at the factory attaching a plastic guard outside underneath the home. They stapled it right through the protective under-flooring and into the aluminum tubing and, my guess, partially through the Pex inside which burst with the additional pressure from freezing and that is why it broke there instead of an elbow. Regardless, any ideas how I can get at this Pex inside the tubing, maybe under the stove, after removal, and just feed a new piece all the way through to the back? Any help would be very much appreciated. Thank you!

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Old 06-11-2016, 08:34 PM   #2
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Sounds to me like you need to cut the line forget about the old in the tubing and reroute a new line to reconnect before and after the bad piece.

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Old 06-12-2016, 04:07 PM   #3
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Yeah I was afraid that may be the only reasonable fix. Thank your for the advice!
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Old 06-13-2016, 11:53 AM   #4
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If the pex is loose enough to move inside the tubing, you may be able to get a insert coupling and hook the new pex to the old and pull it though the framing to replace it.

However, I suspect that you're correct about it being stapled through and tjerrard may have the best solution of just bypassing the bad piece.
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Old 06-13-2016, 08:18 PM   #5
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Thanks Bama, I'm going to try that as it is my first choice. I'll post how things went when I get to it. If only there were more hours in a day:-/ Thanks for the interest.
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flagstaff, hot water, leak, water

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