If your toilet was slowly leaking, would you know it? And that if it was, it could cost you an extra $400 or so dollars a year? I am probably guessing you can think of a lot of things you’d rather do with that $400 than pour it into your toilet!
Fortunately, it will cost you next to nothing to check and see if your toilet has a leak, because remember, you can’t hear all leaks (such as if the toilet is “running”).
First, you need to have clean, clear water, if you use a toilet cleaning solution that leaves the water in the bowl green, it will be very hard to to tell if there is a leak. After flushing the toilet, and it has completely stopped running, put about 4-5 drops of food coloring into the toilet tank. Leave it for 15 minutes and come back. Can you see any of the dye in the bowl of the toilet, or did all the color remain in the tank? If you see dye in the bowl, you have a slow leak and should get it fixed by a plumber, so you don’t keep sending all that extra water down the toilet.