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