The 850 In-Line Double Check Assemblies are expertly designed to prevent the backflow of objectionable but non-toxic pollutants into the potable water supply. Key Features: Pollutant Prevention: Specifically designed to block non-toxic pollutants from entering the drinking water. Durable Construction: Made with a robust bronze body for long-lasting performance. Connection Type: Features threaded ball valve end connections for easy installation. Maximum Working Pressure: Rated for up to 175 PSI. Specifications: SKU: 15001020 Backflow Lead Free: Yes Backflow Prevention Type: Double Check Backflow Shape: Inline Manufacturer Part Number: T1112 Primary Material: Brass Primary Size: 3/4 inch (0.75 in.) Fitting Connection Type: Female Thread Primary Color: Bronze