Advise on how to repair leaking copper sweat joint


Old 09-05-14, 06:14 PM
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Advise on how to repair leaking copper sweat joint

Hi guys and gals, looking for some advise. We are doing a bath remodel and had to tear out some of the rotted subfloor to replace, while I was checking out joist etc underneath the subfloor I have noticed that one of the sweat joints on a tee fitting is slowly leaking. Please see link to the pix below. We can remove a section of subfloor right above the leaking joint, so what would be the easiest and most effective way to repair this? There is about 1/4 inch or so between elbow and the tee. Heat it up and disassemble, clean pipes and put a new tee? Though a bit concerned about the elbow being so close...
Would appreciate any advice.
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Old 09-05-14, 06:21 PM
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Can't tell from the pics where it's leaking... must not be a very bad leak or the wood and drywall would be all stained. But yeah, depending on where it's leaking, you could try draining the lines, cut the straight pipe, heat up the fitting so as to remove the leaking pipe from the joint... then clean up the fitting and pipe with your brush... flux it up and resolder it, using a repair coupling on the straight pipe.
Old 09-05-14, 07:26 PM
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Thanks for the reply, it appears to be leaking/slowly seeping at the left joint on the tee where excessive corrosion/oxide is.
Old 09-06-14, 06:17 AM
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When you use your torch, get some scrap pieces of ceramic tile to place under the fittings and on top of the wood. That way you can heat it up without fear of fire. Good time to check all those fittings. Grab them and shake them a bit and see if they shows signs of looseness or stress.
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