This 8 inch reduced pressure detector backflow preventer assembly (RPDA) is designed for health hazard applications in fire protection systems. It prevents the reverse flow of substances like glycerin wetting agents, stagnant water, and non-potable water from entering the potable water supply due to backsiphonage or backpressure.

The assembly features a modular check design for simplified maintenance and is coated with **ArmorTek®**, a patented three-part advanced epoxy system, to resist **microbial-induced corrosion (MIC)** and protect exposed metal surfaces. It is equipped with **AWWA epoxy coated, UL Classified and FM Approved OSY resilient seated gate valves**, a **GPM meter** to detect underground leaks and unauthorized water use, and ball type test cocks. A pressure differential relief valve is positioned between the check valves.

Flood Detection System

• Includes a **flood sensor** with **SentryPlus Alert® technology** to detect excessive water discharges from the relief valve.
• The sensor is installed on the assembly exterior and does not affect assembly functions or certifications.
• An add-on connection kit (sold separately) is required to activate the flood sensor. Without the kit, the sensor acts as a passive component with no communication capabilities.
• When activated with a connection kit, the sensor relays signals to facility personnel for corrective action, helping to limit flooding and costly damage.
• The flood alert features can integrate with **BMS** and **cellular network communication**.
• Integration with the **Sensor Control Monitor** enables alerts to **BAS** via **RS-485 Modbus** or the **Nexa® platform** through **Wi-Fi connectivity**.