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Leaky Heating Pipe #5408944 04/20/20 06:50 PM
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Mangos86 Offline OP
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Hello! I have a pipe in my basement that has a very, very slow drip leak. It is a forced hot water heating pipe. It is leaking at the connection from Copper to Pex. The heat has been off for the last few days, and I'm assuming the temperature change in the connection/pipe has caused it? The heating system is a closed loop system filled with water/antifreeze. If this were just a regular water connection I would feel more comfortable fixing it myself. I have my plumber/heating guy coming out to do our annual boiler service, but would like to save the money if something easy to fix. Thanks for the feedback.
[Linked Image]
[Linked Image]

Last edited by Mangos86; 04/20/20 06:59 PM. Reason: Replaced PVC with PEX

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Re: Leaky Heating Pipe [Re: Mangos86] #5408955 04/20/20 06:57 PM
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AlaskaMike Offline
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Are you sure that's not PEX? If it is, I'm pretty sure there are unions intended to transition from PEX to rigid copper. I've never messed with PEX myself though.

If you just want a band-aid fix you could try wrapping it tightly with silicone tape and see if that takes care of it.

Re: Leaky Heating Pipe [Re: Mangos86] #5408957 04/20/20 06:58 PM
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sloinker Offline
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SharkBite fitting. If there is some slack you can take the fitting off and inspect the pipe ends and more importantly the distance between them. A new fitting is less than 10 bucks. I've never seen one do this unless the cuts weren't square and/or fully inserted.


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Re: Leaky Heating Pipe [Re: AlaskaMike] #5408958 04/20/20 06:58 PM
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Mangos86 Offline OP
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Im sorry it might be pex. I don't know anything about plumbing, but I consider myself relatively handy.


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Re: Leaky Heating Pipe [Re: Mangos86] #5408959 04/20/20 07:00 PM
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WhyMe Offline
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that looks like a shark bite fitting. you can remover it and replace it easily or put something more permanant in there . Do you have any extra length in the pex? i would sweat an adapter on the copper and then attach the pex to it.

watch this vid for more info

https://www.youtube.com/watch?time_continue=29&v=kyY4zJ2UKQw&feature=emb_logo

Last edited by WhyMe; 04/20/20 07:02 PM.
Re: Leaky Heating Pipe [Re: Mangos86] #5408962 04/20/20 07:02 PM
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ripcord Offline
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That's a push fit coupler, easily available in any hardware store. You literally just push both ends into the fitting and it grabs on and seals to the pipe.
https://www.lowes.com/pd/SharkBite-...ect-dia-Coupling-Push-Fitting/1000182597

Here's a cheap tool for disconnecting it:
https://www.lowes.com/pd/SharkBite-3-4-in-Fitting-Removal-Tool/1000182587

Obviously, the heat exchange fluid is going to come pouring out of you don't drain the system, first. Best of luck!

Re: Leaky Heating Pipe [Re: Mangos86] #5408965 04/20/20 07:04 PM
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Wolf359 Offline
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Yeah looks like a shark bite fitting. You could probably use the tool to release it and then make sure it's got a clean cut and install it again.

https://www.homedepot.com/p/SharkBite-1-2-in-Push-to-Connect-Disconnect-Clip-U710A/100638139

Re: Leaky Heating Pipe [Re: Mangos86] #5408989 04/20/20 07:35 PM
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walterjay Offline
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You will have to drain down the heating system to a level below the pipe. Afterwards you will have to re-fill the system. If there is an automatic water feeder on the boiler you need to shut it off or it will keep injecting water into the system as you try to drain it. If you are not comfortable with this consider getting a heat guy in to do it.

Re: Leaky Heating Pipe [Re: Mangos86] #5409005 04/20/20 07:58 PM
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Mangos86 Offline OP
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Thanks for all the feedback! I have no idea how to drain the system, or anything to do with that. My heating guy is coming for the annual boiler service, and I'm sure they can take care of it for me.


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Re: Leaky Heating Pipe [Re: Mangos86] #5409055 04/20/20 09:10 PM
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WhyMe Offline
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Originally Posted by Mangos86
Thanks for all the feedback! I have no idea how to drain the system, or anything to do with that. My heating guy is coming for the annual boiler service, and I'm sure they can take care of it for me.


i would have him take out the sharkbite and do a permanant fix

Re: Leaky Heating Pipe [Re: Mangos86] #5409059 04/20/20 09:16 PM
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Oildudeny Offline
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That looks like a shark bite fitting.. I would replace the shark bite with a compression union or compression to pex... on the copper side if that's 1/2" a 5/8" compression will fit.

Get yourself a small tube pipe thread compound the union will thread together with less effort and seal better.

Re: Leaky Heating Pipe [Re: Mangos86] #5409060 04/20/20 09:17 PM
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wog Offline
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Make sure he knows you have antifreeze,so he doesn t dump it on ground or drain.. have some extra buckets, put it back in. Plumber might use a propress setup,better connection.

Re: Leaky Heating Pipe [Re: wog] #5409065 04/20/20 09:23 PM
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Oildudeny Offline
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Good call hopefully there's shutoff valves to isolate the repair..

Re: Leaky Heating Pipe [Re: Oildudeny] #5409243 04/21/20 06:25 AM
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cjcride Offline
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Originally Posted by Oildudeny
Good call hopefully there's shutoff valves to isolate the repair..

Good point. Maybe he could add valves if it needs them.

Re: Leaky Heating Pipe [Re: Mangos86] #5409272 04/21/20 07:07 AM
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Rand Offline
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Thats a sharkbite, not a huge fan of those on hot water but they usually are ok.

The alternative is brazing on a fitting to the copper pipe then using either a compression ring or cinch ring on the pex.

I would probably remove the sharkbite, clean the ends of both pipes if needed, and replace with same thing.. it will last another 10+ years.

Sharkbite lasts better on lower temp lines, but is rated to 200F and 25 year warranty.


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