If your tank ball or floater is not installed correctly, it could cause the flush valve to stay open. Unfortunately, this problem is not always easy to locate. There is rarely any sound associated with this type of toilet leak as it is an internal problem.
Caption Floodwaters pour over Texas dam. Water is seen flowing over the top of a dam at Padera Lake near Midlothian early Wednesday morning following days of heavy rain. Water is seen flowing over the top of a dam at Padera Lake near Midlothian early Wednesday morning following days of heavy rain.
Also, we copied what Mother Nature did in the past. During the last Ice Age (13,000+ years ago) the Cordilleran Ice Sheet blocked the Columbia River at the spot where the dam sits today. The ice formed a huge dam about 500 feet taller than Grand Coulee Dam.