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2

Diverting the leak up to the shower head using the diverter valve should not be a problem, but your assumption that fixing it will be "pretty easy" may not prove to be true. You are correct in that hot and cold supply to the tub/shower valve needs to be shut off. Sometimes apartment shower valves have built in shut-off valves called integral stops. ...


0

Could also be that this is the cold pipe and is uninsulated. In the summer, the pipe will 'sweat' and get wet; the adjacent galvanized pipes and/or hangars may be dissolving out and precipitating on your pipe. But I'd change out the tee first.


3

It looks like the tee in that spot is in need of repair. It likely wasn't sweated (soldered) properly. If you don't fix it, it will likely continue to grow. So in a sense, it is alive... EDIT: I was wrong in an earlier version of this answer where I said that copper oxide is blue: it's actually black. The blue/green that you see may be due to minerals in ...


0

I ended up pouring some very liquid mix of waterproof cement down the pipe and catching it again at the exit, it seems that is filled the little cracks inside the pipe. It's been a few weeks of testing by pouring water down and I don't see any leaks anymore. I have to specify that the pipe was horizontal and the cracks on the bottom part of it, that allowed ...


0

You can seal the joint with polyurethane sealant. This will make the joint water tight and it is expandable up to 900%, as it can accommodate most of the movement.


2

The accepted answer is the correct way to fix the problem. However, if there's a valve that's too corroded to turn the nut, or that isn't fixed by that solution, you can give this a try. It's not a good solution, but it works in a pinch :) A common practice when this type of leak happens is to simply open the valve all the way, except more so. In other ...


5

Try tightening the packing nut (the hex part the stem goes through) a little. That's what it's for. Don't overdo it. The "packing" is the material that seals around the stem - the packing nut compresses that material. On a valve that is not used often, actuating the valve does commonly cause it to leak, as things have "set." Tighten a little, wait, tighten a ...



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