The APOLLOPRESS® Model RPLF4A Series Lead Free* Reduced Pressure Backflow Preventers with Press end connections provide maximum protection against back-siphonage or backpressure from substances that are hazardous to the potable water supply. The top accessed modular check valve cartridges provide captured springs, replaceable seats and reversible silicone seat discs. This Made in America/5 year factory warranty assembly features APOLLOPRESS® ball valves with stainless steel handles and trim and Leak Before Press® technology.