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Why is the pop up valve in the bathroom sink leaking?

Updated: 9/17/2019
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βˆ™ 12y ago

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Pop-up valves may leak from four points: 1) the metal flange atop the pop-up valve, which seats within the ceramic opening of the sink; 2) the pop-up drain locking nut; 3) the pop-up actuator collar nut; and, 4) the P-trap compression fitting. Metal Flange. With all else tight, leaks from the metal flange remain internal to the drain assembly. That is, they do not drip out or create a mess but only keep the sink from holding water, even when a rubber stopper plugs the drain. To fix: Loosen the pop-up drain locking nut and elevate pop-up assembly, and then apply a generous strand of plumber's putty beneath the flange. Re-seat and tighten. Pop-up Drain Locking Nut. Leaks will drip, externally. Above the locking nut, a hard composite washer transfers tightening force to a black rubber seal, which insures water-tight integrity at the bottom of the sink. To fix: Tighten nut. If unsuccessful, replace black rubber seal. Re-tighten. Actuator Collar Nut. Leaks will drip, externally. To fix: Tighten nut. If stripped, replace. P-trap Compression Fitting. Leaks will drip, externally. To fix: replace plastic compression ring and tighten collar.

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βˆ™ 15y ago
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Q: Why is the pop up valve in the bathroom sink leaking?
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