Adjusting the water level in a toilet is a simple but important task that can help save water and improve the performance of your toilet. The water level in a toilet is controlled by a fill valve, which is a device that opens and closes to allow water to enter the tank. Over time, the fill valve can become worn or damaged, which can cause the water level to become too high or too low.
If the water level is too high, it can cause the toilet to run continuously, which can waste water and increase your water bill. If the water level is too low, it can cause the toilet to not flush properly, which can lead to clogs and other problems.