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 argh! leaking drain stem
Author: FritzL (NY)

one of the faucets I put in yesterday is leaking from the drain stem.

sealed the stem in the basin with silicon.
I did not tape the thread on the black stem below the basin.
Nor the PVC, as I never have.

Water puddling in the blue oval, but no sign of water dipping down the black stem.
Seems like capillary action?

I opened and adjusted the PVC connects of the "P" and stem and did find one gasket a little out of place, but it's still puddling.

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 Re: argh! leaking drain stem
Author: george 7941 (Canada)

Doubt capillary action. Wrap some tissue around the black tailpiece, leaving a gap between the tissue and the white PVC nut. I expect the tissue will get wet when the sink is being used.

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 Re: argh! leaking drain stem
Author: steve (CA)

My bet is on water leaking along the threads under the black nut. I would loosen the black nut and wipe some plastic approved paste pipe sealant on the tube threads and retighten the black nut.

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 Re: argh! leaking drain stem
Author: packy (MA)

you need silicone caulk under the sink where the rubber washer is.

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