2.5 957RPDA-OSY-GPM-FS

Item Number: F111626
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$6,940.69
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 2 1/2 inch
  • Weight: 192.0 lb
  • Housing Material: 304 Stainless Steel
  • Max Working Pressure: 175 PSI
  • Flood Sensor: Integrated with SentryPlus Alert® technology
  • Shutoff Valves: OSY Resilient Seated Gate Valves
  • Monitoring: Gallon Per Minute Meter Included
  • Approvals: UL Classified, FM Approved, ASSE 1047, CSA B64.4
  • Design: Extremely Compact and Lightweight

Description

The Watts 2 1/2 inch Series 957RPDA Reduced Pressure Detector Backflow Preventer protects potable water systems from contamination due to back-siphonage or backpressure in health hazard applications. It features a 304 stainless steel housing, UL and FM approved OSY resilient seated gate valves, and a bottom mounted cast stainless steel relief valve. An integrated SentryPlus Alert® flood sensor detects excessive water discharge, while a gallon per minute meter helps monitor for leaks or unauthorized use. This compact and lightweight assembly is approved for horizontal installation. Item number F111626.

Help Me Connect

This 2 1/2 inch Reduced Pressure Detector Assembly features groove fittings, which allow for integral pipeline adjustment and simplified installation into your system. It is approved for horizontal installation.

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Additional Details

This 2 1/2 inch Watts Series 957RPDA Reduced Pressure Detector Assembly Backflow Preventer provides protection to the potable water system from contamination. It is designed for health hazard applications to prevent back-siphonage and backpressure, and to monitor unauthorized water use from the fire protection system.

Features

  • Extremely compact design, up to 70% lighter than traditional designs
  • Housing and sleeve constructed from 304 (Schedule 40) stainless steel
  • Groove fittings allow integral pipeline adjustment
  • Patented torsion spring check provides lowest pressure loss and unmatched ease of serviceability
  • Replaceable check disc rubber for simplified maintenance
  • UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves
  • Bottom mounted cast stainless steel relief valve
  • Metered bypass (gallon per minute meter) to detect leakage or theft of water from the fire sprinkler system

Advanced Monitoring

  • Integrated flood sensor with SentryPlus Alert® technology to detect continuous water discharges from the relief valve
  • Flood alert feature activated with an add-on sensor connection kit, compatible with BMS and cellular network communication
  • Sensor Control Monitor (optional add-on) enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi

Warning: It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in in the United States. Consult your local water authority, building, and plumbing codes before installation.

Specifications

  • Size: 2 1/2 inch
  • Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Elastomers: EPDM, Silicone, Buna 'N'
  • Torsion Spring Checks Material: Noryl®, Stainless Steel
  • Check Discs Material: Reversible Silicone or EPDM
  • Test Cocks Material: Lead Free* Bronze Body
  • Pins & Fasteners Material: 300 Series Stainless Steel
  • Springs Material: Stainless Steel

Performance

  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)
  • Maximum Working Pressure: 175 PSI (12.1 bar)

Certificates & Approvals

  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • AWWA C511-97
  • ASSE 1047
  • CSA B64.4
  • UL Classified
  • FM Approved

FAQs

What is the primary function of this backflow preventer?

This 2 1/2 inch reduced pressure detector assembly provides protection to the potable water system from contamination caused by back-siphonage and backpressure, especially in health hazard applications. It also monitors for unauthorized water use.

What is the purpose of the integrated flood sensor?

The flood sensor, equipped with SentryPlus Alert® technology, detects continuous water discharges from the relief valve. When paired with an add-on connection kit, it can relay alerts to facility personnel or building management systems (BMS) for corrective action, helping to prevent flooding and costly damage.

What type of shutoff valves are included with this assembly?

This assembly is furnished with UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves, which offer reliable isolation for maintenance and testing.

What materials are used in the construction of this backflow preventer?

The housing and sleeve are made from 304 (Schedule 40) stainless steel. Other components include EPDM, silicone, and Buna 'N' elastomers, Noryl® torsion spring checks, and Lead Free* bronze test cocks, ensuring durability and corrosion resistance.

What are the maximum operating pressure and temperature limits for this device?

The Watts 957RPDA is designed to operate within a temperature range of 33°F to 140°F (0.5°C to 60°C) and can withstand a maximum working pressure of 175 PSI (12.1 bar).

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