The Watts Series 909RPDA Reduced Pressure Detector Assembly is a 10 inch backflow preventer designed to prevent the reverse flow of fire protection system substances into the potable water supply due to backsiphonage or backpressure.

This assembly is ideal for health hazard applications and ensures the safety of the drinking water supply by detecting and preventing contamination.

Construction & Design

• Features an epoxy coated cast iron body for durability and corrosion resistance.
• Includes OSY (Outside Stem and Yoke) resilient seated gate valves and captured spring check valves.
• Equipped with replaceable stainless steel seats.
• A pressure differential relief valve is located between the check valves.
• Compact design for economy combined with performance.

Corrosion Protection

• Utilizes ArmorTek® coating technology, a patented three-part advanced epoxy system.
• Engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates.
• Coating applied to internal and external surfaces.

Detection & Monitoring

• Comes furnished with a GPM (gallons per minute) meter to detect underground leaks and unauthorized water use.
• Includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
• Sensor relays a signal to facility personnel for corrective action, limiting flooding and costly damage.
• Flood alerts are activated with an add-on sensor connection kit (sold separately).
• Connection kit options include BMS, cellular communication, and the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi connectivity.

Performance

• Offers maximum flow at low pressure drop.
• Designed for easy maintenance with modular check design.