Danfoss-Flomatic has introduced a four-color condensed catalog featuring its unleaded backflow preventers. This literature highlights Flomatic's new unleaded material called Enviro-Check, which is a material patented by The Federal Metal Company. These new units are designed to protect drinking water from cross-connections and are constructed to comply with the laws of the federal and state laws in California. The I-836 material has a maximum 0.05% lead content, which is -99.3% less lead than the standard 7% bronze. The I-836 material has tensile strength of 30,000 psi and yield strength of 17,000 psi. This gives the material superior physical characteristics when compared to the standard bronze and keeps our water safe and clean. Danfoss-Flomatic.