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I am having a leak where my p-trap tailpiece connects into the drain pipe coming out of the wall.

I’ve tried to replace the washer, slip joint (the one in the picture has a built in washer), also replaced the tail piece and still having a leak. Unsure what could be causing this. Could it be an issue with the actual drain pipe in the wall?enter image description here

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  • Is that white plastic nut the one that came with the chrome Ptrap? Most chrome units come with a chrome nut. Using a nut other than supplied may be the problem. Some nuts are self sealing and don't require a washer. Using a washer with them will result in a leak. A disassembly of the piping there and a good clear picture of the inside of the nut and the fitting it goes on could give us a better idea.
    – RMDman
    Commented Apr 12 at 15:34
  • Are you certain the tapered washer under the nut is oriented the correct direction? The tapered part goes into the joint, and the flat part rests against the inside of the nut.
    – Huesmann
    Commented Apr 13 at 12:48

2 Answers 2

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Most likely you just need to tighten up the slip-joint nut with large pliers. Some people (including plumbers) think they only need to be hand tight. I always snug them up with a wrench.

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My first impression of that photo is a drip leak coming from the faucet, not from the drain pipe. The drain pipe is just in the way of an otherwise simple problem somewhere else.

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