WaterSense chief details progress of flushometer, commercial bowl certification
About 11,000 different products are carrying the WaterSense label. Labeled products must be 20% more efficient than required under national standards. Each standard comes along with a performance requirement in addition to the water conservation requirement. There are 26.7 million flushometer valves in use and 500,000 are sold annually. They plan to test matching bowls and fittings from manufacturers and then mix and match bowls and flush valves.