Help With leaking Compression Fitting


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Old 02-11-08, 07:11 PM
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Help With leaking Compression Fitting

Recently discovered a very small leak coming from the 5/8 copper compression fitting on the outflow side of my tankless water heater. I tried to tighten it, and it did slow it down some, but it is still ever so slightly leaking.
I am thinking maybe I should try to replace this with a solder type fitting? Any help greatly appreciated!
 
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Old 02-11-08, 07:41 PM
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Unscrew the nut all the off and pull the pipe out and reconnect the pipe. This sometime this reseat the connection and stop the leak. If not you can sweat in union, coupling, or even flare.
 
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Old 02-11-08, 07:45 PM
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Ditto, then dope the heck out of it!!!
 
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Old 02-12-08, 11:43 AM
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Alright, I removed the nut, and put a "helluva" lotta pipe dope on the trheads, retightened it as tight as I could. And
It still seeps out , but it is very sloooooooooooow.
I put a small plastic container under it to see how much was leaking, and it was just barely wet the next day.
I can either live with it, or put sweat fitting on, However, I am concerned about doing that? Could the heat from sweating this fitting on, damage the tankless unit?
 
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Old 02-12-08, 11:59 AM
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Wink

small leak coming from the 5/8 copper compression fitting on the outflow side of my tankless water heater.
In no way should you dope the fitting there. Ill bet that the 5/8 pipe was not set down in the fitting as it should have . So that the compression sleeve was all the way up on the pipe as it should have been. You can buy a new compression sleeve and get a piece of 5/8
copper to fit into it. then solder the other end of that copper pipe to the copper pipe This way you will be away from the unit when you solder
 
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Old 02-12-08, 03:50 PM
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You cant't cut off the old ferel and install a new one?? I've done several times when the old one wasn't installed on the pipe far enough.
 
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Old 02-12-08, 06:46 PM
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I dont know, if I cut off Ferrel it will shorten my pipe, about inches, and I dont think I would have enuff pipe left to get it straight into the fittiing. the Ferel is back on the pipe about 2inches. and it is fairly difficult to bend this pipe, I think that may be part of the problem, that is, the pipe is going in on a very slight angle. That has always been a problem with me, and compression fittings, as they have to be going in perfectly straight to seat correctly.
 
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Old 02-12-08, 07:05 PM
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Originally Posted by roadhawg3 View Post
I dont know, if I cut off Ferrel it will shorten my pipe, about inches, and I dont think I would have enuff pipe left to get it straight into the fittiing. the Ferel is back on the pipe about 2inches. and it is fairly difficult to bend this pipe, I think that may be part of the problem, that is, the pipe is going in on a very slight angle. That has always been a problem with me, and compression fittings, as they have to be going in perfectly straight to seat correctly.

I meant to cut only the ferrel off, leaving the pipe intact.
 
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Old 02-13-08, 10:13 AM
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The Feral is about 2 inches from the end of pipe, so if I cut it off there it will make pipe 2 inches shorter.
 
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Old 02-13-08, 10:18 AM
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Oh yeah, alright, now I see what your saying.
cut feral off with a hacksaw I would guess?
would have to be careful not to damage pipe.
 
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Old 02-13-08, 05:07 PM
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Originally Posted by roadhawg3 View Post
Oh yeah, alright, now I see what your saying.
cut feral off with a hacksaw I would guess?
would have to be careful not to damage pipe.

Now you got it mate. Small file also will work
 
 

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