PLUMBING TIP OF THE DAY July 31 2013 July 31, 2013 Check toilets for hidden leaks. Add six drops of food coloring to the toilet tank. If the toilet is leaking, color will appear in the bowl within 30 minutes Share This Post PrevPreviousPLUMBING TIP OF THE DAY June 30th 2013 NextPlumbing ReviewsNext