Watts 0061888 Backflow Preventer Dual Check Valve

Description:

The Watts 0061888 9D-M2 Backflow Preventer Dual Check Valve is a 3/4 inch bronze dual check valve with an intermediate atmospheric vent designed to prevent backpressure and backsiphonage from contaminating potable water systems in non-health hazard applications. Commonly installed in boiler feed lines, laboratory equipment, processing tanks, sterilizers, dairy equipment, water treatment systems, and commercial process piping requiring reliable backflow protection. Maintenance technicians, plumbing contractors, facility engineers, and system integrators use this valve for code compliance, replacement projects, preventive maintenance, and new installations requiring dependable cross-connection control and potable water protection.

Applications:

The Watts 9D-M2 Dual Check Valve is widely used in boiler feed water systems, commercial heating systems, laboratory facilities, sterilization equipment, food and beverage processing plants, dairy operations, manufacturing facilities, water treatment skids, institutional buildings, schools, hospitals, mechanical rooms, and industrial process systems. The valve prevents reverse flow of polluted water into potable water supplies during backpressure or backsiphonage conditions while maintaining continuous pressure operation. Its integral atmospheric vent provides an added level of protection for non-health hazard applications, making it a common choice for smaller supply lines where regulatory compliance, equipment protection, and water quality preservation are essential.

Technical Specifications:

• Manufacturer Part Number (MPN): 0061888
• Brand: Watts
• Model: 9D-M2
• Product Type: Dual Check Valve Backflow Preventer
• Series: 9D
• Connection Size: 3/4 in.
• Inlet Connection: Female Union NPT
• Outlet Connection: Female Union NPT
• Body Material: Bronze / Forged Brass
• Internal Components: Stainless Steel
• Check Valve Type: Dual Check with Atmospheric Vent
• Protection Type: Backpressure and Backsiphonage Prevention
• Hazard Classification: Non-Health Hazard Applications
• Integral Strainer: Yes
• Disc Material: Rubber
• Seat Material: Rubber
• Maximum Working Pressure: 175 PSI
• Minimum Operating Pressure: 25 PSI
• Temperature Range: 33°F to 250°F
• Installation Orientation: Horizontal or Vertical
• Service Media: Hot and Cold Water
• Compliance Standard: ASSE 1012
• Function: Potable Water Backflow Prevention and Cross-Connection Control

Common Replacements:

• Watts LF9D-M2 3/4" Lead-Free Dual Check Valve
• Zurn Wilkins 9D Series 3/4" Dual Check Backflow Preventer
• Apollo 3/4" Dual Check Valve with Atmospheric Vent (ASSE 1012