BACKFLOW PREVENTION: The Watts 1/2" Lead-Free Bronze Spill-Resistant Anti-Siphon Vacuum Breaker Backflow Preventer is specifically designed to prevent the reverse flow of polluted water from entering into the potable water supply due to back-siphonage and/or backpressure on indoor point-of-use applications. COMPREHENSIVE FEATURES: This preventer is equipped with a 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. DURABLE CONSTRUCTION: This preventer is constructed with a highly durable lead-free bronze body, ensuring long-lasting performance. It has a minimum operating pressure of 8 psi (55.2 kPa) and a maximum pressure of 150 psi (10.3 bar). It also features an internal polymer coating that enhances efficiency. VERSATILE APPLICATIONS: The spill-resistant design of this backflow preventer makes it versatile for indoor use health hazard applications and is specifically suitable for use on machines or equipment in general plumbing applications. EVERY DROP COUNTS: Water. It's in our name and close to our hearts. Since 1874, Watts Water Technologies has been delivering innovative technologies that make the world's most precious resource safe and accessible. Everything we design is made to keep the Earth's most precious resource safer, cleaner, and more useful for our customers. Our family of brands offers one of the most varied product lines in the world, with world-class, water-related solutions.