Hi, My bath tub drain leaks only when standing and have shower in the tub. No problem when draining off bath tub water or when the shower is running with no one in the tub, what could be the problem and how do I fix it.......Bridget
It sounds to me like you might have a hard to see crack, possibly around the drain area where they seem to be most common.
Although it could be anywhere on the bottom of the tub. Close inspection is needed. It is also possible the drain is coming loose, I'd check that first.
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