Here’s a brief summary of common reasons why a sink trap might be leaking and potential solutions The connections between the trap, tailpiece. This can lead to water damage and other plumbing issues If tightening doesn't work, replace the washers or apply pipe sealant to the threads to create a tight. To fix a leaking p trap under a kitchen sink, tighten slip nuts, renew washers, realign the trap, then test for fresh drips.
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