it. A stopper may also discourage some insects from passing through the drain opening.
However, covering a sink does not repair plumbing, restore a dry water seal, eliminate bacteria, or guarantee that pests won’t enter your home.
It’s also important to distinguish between covering the drain and covering the entire sink basin.
A drain stopper or fitted drain cover targets the opening itself. Placing a large lid, towel, or other material over the entire sink is a different practice and generally offers no special plumbing benefit.
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