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 Kitchen drain tailpiece to strainer connection - Leaking Up
Author: usurpers26 (CT)

I had to re-apply putty to my kitchen sink strainer (which stopped the initial leak). Upon reassembly, the flanged tailpiece (w/ plastic nut and top-hat washer) leaks when reattached to strainer...but it is leaking up the threads, against gravity. Didn't believe it at first myself but I only attached the tail piece and put a bucket under and watched as the sink drained.

I tried a couple different plastic nuts I had laying around, same thing.

Does that mean the threads on my strainer are shot or am I just now not getting a good seal with the plastic nut on the stainless threads?

Should I use some tape or sealant on the threads? Non-plastic nut? New strainer?

Thanks in advance!

Edited 1 times.

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 Re: Kitchen drain tailpiece to strainer connection - Leaking Up
Author: george 7941

The seal is not at the threads but at the plastic washer. The washer is not sealing properly.

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 Re: Kitchen drain tailpiece to strainer connection - Leaking Up
Author: bernabeu (SC)

new top hat washer and new metal nut

the assembly must be 'square' and properly aligned


"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

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 Re: Kitchen drain tailpiece to strainer connection - Leaking Up
Author: packy (MA)

i have better luck with the flat rubber washer.

yeah, use a metal nut but make sure the nut is solid brass.


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 Re: Kitchen drain tailpiece to strainer connection - Leaking Up
Author: george 7941

I keep these thick O-rings around, they take care of tailpieces which do not line up squarely. Saves me redoing the drain and the O-rings are readily available at industrial supply houses like Grainger.

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