It's not just low flow, it's the law. In 1995, the National Energy Policy Act mandated the use of toilets that use no more than 1.6 gallons of water per flush. Since then, low-flow plumbing fixtures including toilets, faucet aerators and showerheads have been developed that save substantial amounts of water compared to conventional fixtures while providing the same utility.
Different types of low-flow toilets use various technologies aimed at making the toilet more functional. Some toilets have large drain passages, redesigned bowls and tanks for easier wash down. Others supplement the gravity system with water supply line pressure, compressed air, or a vacuum pump.
Conventional faucet aerators don't compensate for changes in inlet pressure, so the greater the water pressure, the more water you use. New technology compensates for pressure and provides the same flow regardless of pressure. Aerators are also available that allow water to be turned off at the aerator itself. Showerheads use similar aerator technology and multiple flow settings to save water.
Low-flow toilets use a maximum of 1.6 gallons of water per flush compared with about 3.5 gallons of water used by a standard toilet. Low-flow shower heads use about 2½ gallons of water per minute compared to between four and five gallons per minute used by conventional heads. Low-flow faucet aerators can cut the water usage of faucets by as much as 40% from 4 gallons per minute to 2½.
Replacing your existing “standard” plumbing fixtures with water saving plumbing fixtures products will have a huge impact on your overall water consumption. It will be a great step towards making a difference in water conservation.
Many manufacturers offer a big selection on low flow shower heads, dual flush toilets or dual flush toilet kits.
Replacing standard shower heads with low flow shower heads does not require a lot of money and it has a 1-2 year payback. Low flow shower head gpm can be as low as 0.5 gpm. I recommend getting the best low flow shower head so you can save lots of water.
If you have a fairly new toilet, and it is not in your budget to buy a new low flow of dual flush toilet, get the dual flush kit. It does the job and for very low up front expense.