Symposium Speakers Reveal Top 5 Water-Saving Products
During yesterday’s opening afternoon session of an Emerging Technology Symposium co-convened by IAPMO and WPC, researchers John Koeller (Alliance for Water Efficiency) and Bill Gauley (Veritec Consulting, Inc.) revealed their top five new and innovative water-saving products. Koeller and Gauley noted that their presentation results were purposely left out of informational materials given to attendees before the symposium began in order to prevent any pre-event “leaking” of the winners.
Their top five products, presented in inverse order, are: dual flush toilets, one-pint urinals, package graywater systems, high-efficiency residential humidifers and high-efficiency pre-rinse spray valves. According to Koeller and Gauley, the combined annual water savings of these products, at just 5% market penetration, is more than 200 billion gallons. They also said that only the humidifiers require any behavorial modification for effective consumer use, namely basic maintenance.
Product selection criteria included: must use indoor water only, water use that can be readily determined, general availability in the marketplace and favorable economics, and real potential for significant long-term water savings, whether potable or non-potable.
As for one-pint urinals, they listed many manufacturers, including Zurn, Caroma, Sloan and Toto. “These urinals are my personal favorite alternative to the waterless urinal because they require just one-eighth of a gallon to work,” Koeller said.
When discussing package graywater systems, Gauley pointed out that these are off-the-shelf products designed for retrofit use to capture and treat graywater. Systems currently active in the marketplace are Aqus (by Sloan) and Rewater. Those still in development are being made by Pontos and Perpetual Water.
The type of high-efficiency residential humidifiers Gauley and Koeller listed as product number four are the contemporary flow-through models, and not the old drum units. The speakers noted that the use of these humidifiers is generally applicable to all cold-weather homes in the United States and Canada.
High-efficiency pre-rinse spray valves were selected for both their water and energy savings, noted Gauley and Koeller. EPACT requires a maximum flow rate of 1.6 gpm in the United States, yet some manufacturers have valves that use 1.3 gpm or less for even greater savings. Manufacturers mentioned were T&S Brass, Bricor and Fisher.
Gauley and Koeller said they hoped the naming of innovative water-saving products would become an annual occurrence.