Danfoss' Flomatic Valves has introduced the RPZE and DCVE unleaded bronze backflow preventers. Flomatic's patented unleaded material, called Enviro-Check, is a I-836 material with a maximum of 0.05% lead content, and it has a tensile strength of 30,000 psi and a yield strength of 17,000 psi. The backflow preventers are available in a variety of sizes and configurations from 1/2" to 8". www.flomatic.comFlomatic Valves.