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Moisture keeps showing up around a toilet supply connection
When moisture appears near a toilet shutoff or tank connection, what’s the safest way to tell whether it’s coming from the connection or from a failing supply line? I’d want to know whether it returns after the area is dried and the toilet is flushed, and whether it first appears at the shutoff, along the hose, or at the tank.
At what point should the water be shut off rather than trying to adjust a connection? I’d be especially interested in signs that the line or valve needs replacement by a plumber, since tightening an unidentified fitting could make things worse.
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Dry the area thoroughly, then use separate strips of tissue at the shutoff, along the hose, and around the tank connection. After flushing, the first strip to become wet helps locate where moisture is emerging. If water is actively dripping, the line looks split, bulged, corroded, or otherwise damaged, or the shutoff itself leaks, stop testing and shut off the toilet’s supply if you can do so without forcing the valve; call a plumber. Don’t tighten a fitting you can’t identify.
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