A leak the size of a pencil point will waste more water than a family of five persons needs; therefore, it is to your interest to stop all leaks, no matter how small they appear to be. Leaks in toilet fixtures are largely the cause of high water bills. To determine whether or not your plumbing fixtures are in good order, stop the flow of water from all openings; if the meter is in proper working condition, the lowest denomination will continue to move in case there is leakage.