Conservation is major concern with most municipalities today. In 1990, 30 US states reported water-stress conditions, in 2000 40 states, in 2009 45 states. 75% of water used indoors is in the bathroom and 25% of this is for the toilet. The average toilet uses 4 gallons per flush. By using water-saving devices you can reduce your water use by 35%. This means an average household which uses 130,000 gallons per year could save 4400 gallons of water per year or daily the average is 350 gallons and you could save 125 gallons of water per day just by retrofitting a toilet to use less water.
Saving water can be achieved with an insignificant investment. It can help your community and provide you benefits of saving money on your water bill.
There are a few ways to retrofit a toilet. The most common approach is a displacement device. The devices are placed inside the tank to take up room and the tank will not fill up with as much water each time you flush. Some devices used are bricks, or plastic bottles. This can reduce the water used by a toilet by 4 gallons a day but this is a short term solution. Bricks can deteriorate and cause damage to the other mechanisms and water bottles need to be weighted down so they will not float.
Another device is a displacement dam; the plastic dams are wedged into the tank on both sides decreasing the amount of water in the tank. This saves about 6 gallons of water per day. They are less likely to move around than the bricks or bottles, but they also deteriorate over time and affect the flush performance which can lead to double flushing.
The best solution is an early-close toilet flapper. An early-close toilet flapper shuts off the water flow to the bowl before the toilet tank is empty. The flapper is adjustable to find the ideal level that saves water and still cleans the toilet avoiding double flushing. The toilet flapper closes after a certain amount of water leaves the tank. This helps gravity drain the tank more quickly. This type of device can save up to 50% of present water consumption.