A residential sink faucet is held securely in place by a combination of a threaded mounting shank, a heavy-duty metal or plastic mounting nut, and a support bracket or washer tightened against the underside of the sink deck or countertop. Additionally, rubber or foam mounting gaskets sit between the top of the sink and the bottom of the faucet base to prevent water from seeping through the mounting holes. Verification: Check the underside mounting nut to ensure it maintains tight clamping pressure against the sink deck.
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