How was the final specification for high-efficiency faucets developed?
All WaterSense specifications are developed through a market research, technical review and stakeholder input process. In developing the specification, EPA collaborated with interested parties representing industry, water utilities, and water-efficiency advocacy groups. EPA industry and product research, as well the American Society of Mechanical Engineers (ASME) A112.18.1/Canadian Standards Association (CSA) B125.1 standard for Plumbing Supply Fittings, form the basis for the WaterSense bathroom sink faucet specification. [ top of page ] What are the details of the specification? The WaterSense specification sets the maximum flow rate of faucets and aerators at 1.5 gallons per minute (gpm), tested at a flowing pressure of 60 pounds per square inch (psi, common water pressure in most households). The specification also includes a minimum flow rate of 0.8 gpm, tested at a flowing pressure of 20 psi, to ensure performance across a variety of different household conditions. [ top of page
