The Apollo® Model DC4A series Conbraco 4A105A2F 1-inch double check backflow prevention valve protects potable water from contamination caused by back-siphonage or backpressure. Durable bronze construction and serviceable top-access cartridges make this a contractor-ready choice for residential and commercial systems. Bronze body: ASTM B584-C84400 bronze for corrosion resistance. Performance: Rated to 175 psi and suitable from 33°F to 180°F. Serviceable design: Top-access modular cartridges with captured springs, replaceable seats, and reversible silicone seat discs. Isolation & testing: Ball valve shut-offs with stainless steel handles and nuts, SAE threaded testcock protectors for easy testing. Certifications: NSF/ANSI 61 and NSF/ANSI 372 shown on product documentation where applicable. Durability: Chloramine-resistant elastomers and a Made in USA assembly backed by a five-year Apollo factory warranty. Connections are standard 1-inch female (FPT/NPT). See the included IOM and submittal sheet for detailed dimensions, installation instructions, and test requirements. Designed for horizontal and vertical-up installation; compatible with standard potable water systems.
