This 8 inch reduced pressure detector backflow preventer assembly, Series 909RPDA, is designed to prevent the reverse flow of fire protection system substances into the potable water supply. It provides essential protection against backsiphonage and backpressure in continuous pressure piping applications and at cross-connections identified as health hazards.

Construction & Design

• Features an epoxy coated cast iron body, domestic OSY resilient seated gate valves, captured spring check valves, and a pressure differential relief valve.
• The modular check design facilitates easy maintenance and assembly access.
• Includes replaceable stainless steel seats and top-mounted bronze test cocks.
• A CFM (cubic feet per minute) meter is integrated to detect underground leaks and unauthorized water use.
• The unique air-in/water-out relief valve design provides maximum capacity during emergency conditions.

Corrosion Protection

• The backflow preventer's iron components are coated with ArmorTek®, a patented three-part advanced epoxy system.
• This advanced coating is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrate, applied to both internal and external surfaces.

Flood Detection

• Equipped with a flood sensor featuring SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
• When activated via an add-on sensor connection kit (sold separately), the sensor relays a signal to trigger notification to facility personnel, helping to limit flooding and costly damage.
• The flood sensor is installed on the assembly exterior and does not alter assembly functions or certifications.