9DSM3 Watts 1/2" Sweat Leaded Dual Check Valve With Atmospheric Vent

• Backflow Preventer
• Type Dual Check Valve
• Applicable Standard ASSE 1012, CSA B64, CSA
• Valve Configuration Vertical, Horizontal
• Nominal Size 1/2"
• End Connection Female Soldered Union x Female Soldered Union
• End to End Distance 4-3/8"
• Body Material Forged Brass
• Seat Material Rubber
• Flow Rate 20 GPM
• Temperature Rating 33 to 250 Deg F
• Pressure Rating 175 PSI
• Inclusions/Features Atmospheric Vent, Simplicity, Compact
• Application Laboratory Equipment, Sterilizer, Dairy Equipment, Boiler
• Drain Connection 1/2" Threaded
• Packaging Quantity 1 per Carton
• Warranty 1 Year Limited

Install Instructions
Specification Sheet

True Line-Sized Construction Allows the Check Modules to Open Further Allowing Dirt and Debris to Pass More Freely Reducing Check Fouling; Maximum Flow at Low Pressure Drop; Furnished with Union Connections to Facilitate Removal and Replacement for Maintenance; Compact for Economy Combined with Performance; Design Simplicity for Easy Maintenance; It is Particularly Recommended for Boiler Feed Lines to Prevent Backflow When Supply Pressure Falls Below System Pressure; Series 9D is Suitable for Use on Hot or Cold Water and Can be Used Under Continuous Pressure; A Primary Check Valve Utilizing a Rubber Disc Seating Against a Mating Rubber Part to Ensure Tight Closing; A Secondary Check Valve Utilizes a Rubber Disc-to-Metal Seating; In the Event of Fouling of the Down- Stream Check Valve, Leakage Would be Vented to Atmosphere Through the Vent Port Thereby Safeguarding the Potable Water System; 1 Year Limited Warranty