If the water level in the toilet tank is at the top of the overflow tube, that is where a leak may be occurring. The float that controls the water level in the tank should be adjusted so that the water level in the tank is at least 1 inch below the top of the tube. Toilet tank leaks typically result from worn parts or misalignment of some part of the flushing mechanism. If you are not sure you can handle the job, call a plumber. It is important to stop the leak.
Water leaks are costly.
Our information is provided as a courtesy, with hopes of action on your part that may minimize an unnecessary waste of water and expense to you. During the summer we should ask ourselves this question every day. Small changes in the ways we use water can help preserve our natural resource. With the help of your local garden centers, and this 1999 Summer Bulletin that contains commonly asked questions, answers and tips for wise outdoor use, we could manage our supply. It will also deter diseases and fungus which watering at night may produce.