SUPER TOILETS WATER MISERS
The toilet efficiency race has been a big win for the environment. We’ve seen models with water usage of less than .8 gpf in dual-flush models, and a 1 gpf single-flush model. Flush technology is probably approaching its bottom limit.
But other approaches may squeeze water savings. For example, graywater-fed toilet tanks are now on the market (ones that use lavatory water to fill the toilet tank), along with hand-washing faucets built right into the top of the tank.
Manufacturers will continue to tweak toilet efficiency, no doubt, but the biggest gains could probably be made by simply adjusting our behavior: “If it’s yellow, let it mellow.” GB
The introduction of dual-flush technology is the latest leap forward for toilets. It’s part of a new trend in water saving that puts the onus on the end user to save more water. Existing low-flow toilets can be retrofit with a dual-flush kit relatively easily. For example, the HydroRight system (shown at right) installs in about 10 minutes.
www.gomjsi.com
SINGLE FLUSH
5 gpf = 36,500 gallons/year
3.5 gpf = 25,550 gallons/year
2.5 gpf = 18,250 gallons/year
1.6 gpf = 11,680 gallons/year
DUAL FLUSH
HydroRight Retrofit Kit
1.6/0.8 gpf = 7,000 gallons/year
DAILY RESIDENTIAL INDOOR WATER USE
(before conservation measures)
> If all U.S. households installed water-saving features, water use would decrease by 30%. This would save an estimated 5.4 billion gallons of water per day, resulting in daily dollar-volume savings of $11.3 million or more than $4 billion per year.
> The largest daily user of water in the home is the toilet. By replacing this one product with a high-efficiency toilet (HET) you can greatly reduce a home’s total water use.
Source: American Water Works Association Research Foundation, “Residential End Uses of Water,”
11.2011
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