Tighten the packing nut on the toilet shutoff valve one-eighth turn clockwise to try to seal a leak around the nut. Pro tip: Wrap cloth or masking tape on the plier’s jaws to protect the nut’s finish.

Toilet Leaks can come from cracks in the tank, too. In that case, the only reliable solution is a new toilet. There are really only two main toilet tank parts: The toilet flush valve, which lets water ...