This is a problem we had and what I found. Water was pooling under the sink, not a lot but enough to notice. I closed the drain and put some water in the sink, then discovered a small leak from the gasket between the strainer flange and the pipe. The installers had left a piece of the paper wrapping on the gasket and the seal was leaking. Removing the paper solved my problem. Also, I replaced the gasket under the strainer flange with plumbers putty - all good now.
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RCS
2021 Thor Magnitude XG32
Tow a 2020 Ford Ranger
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