Anti-Siphon, Spill-Resistant, Vacuum Breakers prevent the reverse flow of polluted water from entering into the potable water supply due to back siphonage on indoor point-of-use applications. They have a Lead Free* cast copper silicon alloy body construction, thermoplastic check and float assembly valve, stainless steel springs, tee handles, and a molded diaphragm separating the air inlet from the potable water supply to prevent spillage. Series LF008PCQT is ideal for indoor use on machines or equipment in general plumbing applications.