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The Watts Brass Residential Dual Check Valve Backflow Preventer is designed to prevent the reverse flow of hot or cold polluted water from entering into the potable water supply in smaller supply lines. Capable of being used under continuous pressure, this preventer is particularly suited for use with laboratory equipment, processing tanks, sterilizers, dairy equipment, and similar applications.It is constructed with a highly durable forged brass body with a broad operating temperature range of 33° F (0.5° C) to 250° F (121° C). It can handle a minimum required pressure of 25 psi (1.7 bar) and a maximum pressure of 175 psi (12.1 bar).Equipped with NPT female inlet and outlet connections that contribute to a tight, leak-free seal, the installation of this 3/4 backflow preventer is straightforward and secure and includes everything you need to efficiently prevent the backflow of water in your smaller supply line, such as stainless steel internal working parts, an integral strainer, and rubber discs. Furthermore, it includes two durable, tight-seating rubber check valves: a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing, as well as a secondary check valve utilizing a rubber disc-to-metal seating.The compact design of this preventer makes it adaptable to a variety of setups and ensures that it can be easily handled during installation and maintenance. It can be also be installed in either a vertical or horizontal orientation. BACKFLOW PREVENTION: The Watts Brass Dual Check Valve Backflow Preventer is designed to prevent the reverse flow of hot or cold polluted water from entering into the potable water supply in smaller supply lines. COMPREHENSIVE FEATURES: This 3/4 preventer is equipped with everything needed to efficiently prevent the backflow of water: NPT female inlet and outlet connections, stainless steel internal parts, and an integral strainer. It also includes two durable, tight-seating rubber check valves: a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing and a secondary check valve utilizing a rubber disc-to-metal seating. DURABLE DESIGN: Suitable for use on both hot or cold water, this preventer is constructed with a highly durable forged brass body, and its compact construction ensures it can be easily handled during installation. It has a broad operating temperature range of 33° F (0.5° C) to 250° F (121° C), a minimum required pressure of 25 psi (1.7 bar) and a maximum of 175 psi (12.1 bar). VERSATILE APPLICATIONS: Engineered for smaller supply lines, this versatile preventer can be used under continuous pressure and is particularly suited for laboratory equipment, processing tanks, sterilizers, dairy equipment, and similar 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. UPC 098268004281 ASIN B008FVDIQY Size 3/4 Inch Brand Name Watts Unit Count 1.0 Count Valve Type Dual Check Valve Item Weight 6.4 ounces Thread Size 3/4 Inch Thread Type NPT Manufacturer Watts Model Number 9D-M2 Material Type Brass Connector Type Union Item Type Name Dual Check Valve with Intermediate Atmospheric Vent Exterior Finish Brass Item Dimensions 0.29 x 0.29 x 0.29 inches Number of Ports 2 Maximum Pressure 175 Pound per Square Inch Number of Pieces 1 Specification Met ASSE 1012, CSA B64.3 Certified Included Components Watts Regulator 61888 9D 3/4 3/4 Backflow Preventer Sweat Inlet Connection Size 20 Millimeters Inlet Connection Type National Pipe Tapered Outlet Connection Size 2E+1 Millimeters Outlet Connection Type FNPT Manufacturer Part Number 61888 9D 3/4 Global Trade Identification Number 00098268004281