Disconnect the drain pipe from the sink.
Pipe under kitchen sink disconnected.
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First loosen the nut that attaches the strainer to the drain pipe with channel locks or an adjustable wrench.
The pipe joint compound is a waterproof compound that forms a gasket like seal to stop water from leaking out of clean outs and similar seals.
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Place a 1 gallon plastic bucket under the p trap the bend in the plumbing and turn on the water at the sink.
Check the drain trap for clogs.
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This is a common problem in most households but instead of using electrical tape duct tape or wooden supports this one technique could solve the problem once and for all and you can do it without calling in the plumber.
Go under the sink and place a bucket under the pipe to catch excess water.
Remove any supplies or equipment from the area under the pipes.
This also can happen to plastic drainpipes and any water supply lines so try to narrow down which pipe is the culprit before attempting to fix the pipes that came loose under your sink.
If the above doesn t fix the leak the threads of the plug or pipe could be damaged.
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The strainer is the back section that is located below the sink s white bottom.
If you can remove debris from the trap reconnect it then run water into the sink.
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That should stop it from leaking.
But that s unlikely the fresh pipe dope will probably fix the problem.
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Whatever the reason loose drainpipes result in leaks and possible water damage beneath your sink.
Pipes under kitchen sink keep coming apart.
Replacing drain pipes under kitchen sink disconnect the old drain.
The drain pipe is connected at the bottom of your sink strainer with a slip nut or a coupling nut that connects plastic drain piping to a metal sink strainer.
First you have to disassemble the old drain to enable you to remove the strainer that is most likely the leaky culprit.