Please help I'm a noob and there's a leak under my tub but there's wood(00)

Please help I'm a noob and there's a leak under my tub but there's wood(00)

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Please help I'm a noob and there's a leak under my tub but there's wood Pipe under bathtub drainage leaking water onto floorboards, what do I How To Diagnose a Bathtub Leak DIY - YouTube