3 957RPDA-OSY-GPM-FS

Item Number: F111627
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$7,703.87
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Weight: 213.0 lb
  • Housing Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Shutoff Valves: OSY Resilient Seated Gate Valves
  • Features: SentryPlus Alert Flood Sensor
  • Includes: Gallon Per Minute (GPM) Meter
  • Approval: UL Classified and FM Approved

Description

The 3 inch Watts 957RPDA-OSY-GPM-FS Reduced Pressure Detector Assembly safeguards potable water systems from contamination due to back-siphonage and backpressure in health hazard applications. This compact, 304 stainless steel unit features UL and FM Approved OSY gate valves, a gallon-per-minute meter for leak detection, and a SentryPlus Alert flood sensor. The flood sensor, when paired with an optional connection kit, provides crucial alerts for excessive relief valve discharge, preventing potential flooding. It operates from 33°F to 140°F with a maximum working pressure of 175 PSI. Item F111627.

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Connections & Compatibility

This 3 inch Reduced Pressure Detector Assembly is designed for horizontal installation in plumbing systems requiring protection against back-siphonage and backpressure, particularly in health hazard applications. Its groove fittings allow for integral pipeline adjustment. The integrated SentryPlus Alert flood sensor requires an add-on connection kit for activation. These kits offer compatibility with various communication systems, including BMS (Building Management Systems), cellular networks, and integration with BAS (Building Automation Systems) via RS-485 Modbus or the Nexa platform through Wi-Fi connectivity.

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Additional Details

This 3 inch Reduced Pressure Detector Assembly (RPDA) provides protection to potable water systems from contamination, specifically against back-siphonage and backpressure, making it suitable for health hazard applications and monitoring unauthorized water use in fire protection systems.

The assembly features a flood sensor with SentryPlus Alert technology on the relief valve to detect excessive water discharges. When activated with an add-on connection kit, the sensor relays signals for corrective action, helping to limit potential flooding and costly damage.

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

Features

  • Extremely compact design, 70% lighter than traditional designs
  • 304 (Schedule 40) stainless steel housing and sleeve for durability
  • Groove fittings for integral pipeline adjustment
  • Patented torsion spring checks provide lowest pressure loss
  • Unmatched ease of serviceability with replaceable check disc rubber
  • Bottom mounted cast stainless steel relief valve
  • Metered bypass with gallon per minute (GPM) meter to detect leakage or theft of water
  • UL and FM Approved outside stem and yoke (OSY) resilient seated gate valves
  • Flood alert feature activated with add-on sensor connection kit, compatible with BMS and cellular network communication

Specifications

  • Size: 3 inch
  • Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Elastomer Material: EPDM, Silicone, Buna 'N'
  • Torsion Spring Check Material: Noryl®, Stainless Steel
  • Check Disc Material: Reversible Silicone or EPDM
  • Test Cock Material: Lead Free* Bronze Body
  • Pins & Fastener Material: 300 Series Stainless Steel
  • Spring Material: Stainless Steel
  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)
  • Shutoff Valves: OSY (Outside Stem and Yoke) Resilient Seated Gate Valves
  • Meter: Gallon Per Minute (GPM) Meter
  • Flood Detection: SentryPlus Alert Flood Sensor

Dimensions (Approximate)

  • A Dimension: 31.75 inches (806 mm)
  • C (OSY) Dimension: 18.875 inches (479 mm)
  • D Dimension: 6.6875 inches (170 mm)
  • G Dimension: 30.25 inches (768 mm)
  • H Dimension: 22.25 inches (565 mm)
  • J Dimension: 17.125 inches (435 mm)
  • M Dimension: 9.1875 inches (233 mm)
  • P Dimension: 23 inches (584 mm)
  • Weight: 162 lbs (73 kg)

Certificates & Approvals

  • Approved by the 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 (OSY Only)
  • FM Approved (OSY Only)

FAQs

What is the primary purpose of the Watts 957RPDA-OSY-GPM-FS assembly?

This assembly is designed to protect potable water systems from contamination caused by back-siphonage and backpressure, especially in health hazard applications or for monitoring water usage in fire protection systems.

Does this backflow preventer come with a flood sensor?

Yes, it includes a SentryPlus Alert flood sensor on the relief valve to detect excessive water discharges. An add-on connection kit is required to activate the sensor and enable alert notifications.

What type of shutoff valves are included with this model?

This model (OSY option) is furnished with UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves.

What is the maximum operating pressure and temperature range for this device?

The Watts 957RPDA-OSY-GPM-FS has a maximum working pressure of 175 PSI (12.1 bar) and operates within a temperature range of 33°F to 140°F (0.5°C to 60°C).

Can this product be used for drinking water applications in the United States?

No, a warning states it is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Always consult local water authority, building, and plumbing codes.

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