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.
Generally speaking, the width at the top of the dam should be equal to the height of the dam. In other words, a dam that is 5 metres high should also be 5 metres wide at the top, (see figure 9 below). The final height of your dam should be around 50-60cm above the highest water level of the lake.