Flomatic Valves had introduced the RPZE and DCVE unleaded bronze backflow preventers, approved by The Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California (from 1/2" to 2"). These units are designed to protect drinking water from lead contamination and are constructed to comply with the federal and state laws in California. The unleaded backflow preventers are constructed of Flomatic's Enviro-Check unleaded material, and they are available in sizes from 1/2" to 8".Flomatic Valves. www.flomatic.com