4 957RPDA-DOSY-CFM-FS

Item Number: F113054
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$11,370.18
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 4 inch
  • Weight: 265.0 lb
  • Pressure Rating: 175 psi maximum
  • Material: 304 Stainless Steel Housing
  • Temperature Range: 33°F - 140°F
  • Shutoff Valves: OSY Resilient Seated Gate Valves
  • Includes: Flood Sensor with SentryPlus Alert Technology
  • Metered Bypass: Cubic feet per minute meter
  • Approvals: ASSE 1047, CSA B64.4, UL, FM, AWWA

Description

The 4 inch Watts Series 957RPDA Reduced Pressure Detector Assembly Backflow Preventer with domestic OSY shutoff valves provides critical protection against backpressure and backsiphonage in health hazard applications. Its compact design features a durable 304 stainless steel body and includes a cubic feet per minute meter to detect leaks and unauthorized water usage. Equipped with a SentryPlus Alert flood sensor, this assembly monitors relief valve discharge, alerting personnel to potential flooding when connected to an add-on kit. Approved for horizontal N-pattern installation, it offers reliable performance up to 175 psi for fire protection systems. Item number F113054.

Help Me Connect

Flood Sensor Connectivity

  • The integrated flood sensor requires an add-on sensor connection kit to activate its flood alert feature.
  • Connection kit options enable integration with Building Management Systems (BMS) and cellular network communication.
  • The sensor can integrate with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi when paired with the Sensor Control Monitor.
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Additional Details

This 4 inch Watts Series 957RPDA Reduced Pressure Detector Assembly Backflow Preventer provides protection to potable water systems from contamination due to backpressure or backsiphonage. It is designed for health hazard applications and can monitor unauthorized water use from fire protection systems.

The assembly features a flood sensor with SentryPlus Alert technology to detect continuous relief valve discharge. When activated with an add-on connection kit, the sensor relays alerts to facility personnel to prevent flooding and costly damage.

Key Features

  • Extremely compact design, 70% lighter than traditional designs.
  • Constructed from 304 (Schedule 40) stainless steel housing and sleeve.
  • Includes domestic outside stem and yoke (OSY) resilient seated gate valves.
  • Groove fittings allow integral pipeline adjustment and ease of serviceability.
  • Patented torsion spring check provides lowest pressure loss.
  • Replaceable check disc rubber for easy maintenance.
  • Bottom mounted cast stainless steel relief valve.
  • Metered bypass (cubic feet per minute meter) to detect leakage or theft.
  • Flood sensor with SentryPlus Alert technology for discharge detection.

A 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 standard material product, consult your local water authority, building and plumbing codes.

Specifications

  • Product Type: Reduced Pressure Detector Assembly
  • Assembly Series: 957RPDA
  • Nominal Size: 4 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
  • Shutoff Valves: UL Classified and FM Approved outside stem and yoke, resilient seated gate valves
  • Relief Valve: Bottom mounted cast stainless steel
  • Metered Bypass: Cubic feet per minute meter
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Orientation: Horizontal N-Pattern

Certificates & Approvals

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

FAQs

What is the primary purpose of this backflow preventer?

This backflow preventer is designed to protect potable water systems from contamination caused by backpressure or backsiphonage in health hazard applications. It also monitors unauthorized water use in fire protection systems.

What type of shutoff valves are included with this assembly?

This assembly comes with UL Classified and FM Approved domestic outside stem and yoke (OSY) resilient seated gate valves, which are designed for durability and reliable operation.

How does the flood sensor feature work?

The integrated flood sensor with SentryPlus Alert technology detects continuous water discharge from the relief valve. When connected with an add-on sensor connection kit, it can relay alerts to facility personnel or building management systems (BMS) for corrective action.

What material is the housing and sleeve made from?

The housing and sleeve of this backflow preventer are constructed from durable 304 (Schedule 40) stainless steel, offering excellent corrosion resistance and longevity.

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

This backflow preventer has a maximum working pressure of 175 psi (12.1 bar) and operates efficiently within a temperature range of 33°F to 140°F (0.5°C to 60°C).

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