Explained. Depending on the design of your sink, it may have one, two or three holes, and they may appear between the faucet ...

When used atop a kitchen sink drain, the plunger creates a vacuum effect, (hopefully!) loosening the clog and allowing it to be flushed away with water. Cover any overflow drains or additional drains ...

Almost none of the sinks I’ve seen have an overflow tube. When I’ve asked ... if you need a French drain, or to regrade the yard? Currently we are making do with portable pumps in a house ...