This 2 1/2 inch stainless steel reduced pressure zone backflow preventer assembly is designed to prevent the reverse flow of contaminated water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and/or backpressure. It is ideal for protection at cross-connections identified as health hazard applications and from other contaminants found at the service line entrance.

Features

• Features a flood sensor with SentryPlus Alert® technology to detect continuous discharge from the relief valve.
• An add-on sensor connection kit is available to extend flood monitoring and activate the sensor for compatible assemblies.
• Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS (Building Automation Systems) via RS-485 Modbus or the Nexa® platform by Wi-Fi connectivity.
• Stainless steel construction provides long-term corrosion resistance and maximum strength.
• Stainless steel body is half the weight of competitive designs, reducing installation and shipping costs.
• Short end-to-end dimensions make retrofitting easy.
• Cam-check assembly provides maximum flow at low pressure drop.
• No special tools required for servicing.
• Compact construction allows for smaller enclosures.
• Stainless steel relief valve features a balanced rolling diaphragm to eliminate sliding seals and lower maintenance costs.
• A sensor is located on the relief valve for flood detection.
• Flood alert feature activated with an add-on sensor connection kit, compatible with BMS and cellular network communication.

Construction

• This compact and short lay length design with a single access cover consists of a lightweight stainless steel body, domestic non-rising stem resilient seated gate valves, spring loaded cam-check valves, a pressure differential relief valve, and test cocks.
• All internal metal parts are 300 Series stainless steel.
• The main valve body is 300 Series stainless steel.
• The check assembly is made of Noryl®.
• The differential relief valve is of stainless steel construction and utilizes a rolling diaphragm with no sliding seals.
• Flange dimensions are in accordance with AWWA Class D.

Flood Sensor System

• This backflow assembly contains a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
• When paired with an add-on connection kit, the sensor is activated to relay alerts for potential flooding events.
• Connection kit options include BMS, cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
• An add-on connection kit is required to activate the flood sensor. Without the connection kit, the flood sensor is a passive component that has no communication with any other device.
• Use of the flood sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including the need to provide proper drainage in the event of a discharge.