2 1/2 957ZRPDA-OSY-GPM

Item Number: 0111650
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$9,206.59
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Product Type: Reduced Pressure Detector Assembly Backflow Preventer
  • Weight: 200.0 lb
  • Nominal Size: 2 1/2 inch
  • Housing Material: 304 (Schedule 40) Stainless Steel
  • Installation Pattern: Z Pattern (Horizontal)
  • Shutoff Valves: OSY Resilient Seated Gate Valves
  • Meter: Gallons Per Minute (GPM)
  • Maximum Working Pressure: 175 PSI
  • Flood Sensor: Included on relief valve

Description

The Watts Series 957RPDA 2 1/2 inch Reduced Pressure Detector Assembly Backflow Preventer is designed to protect potable water systems from contamination caused by back-siphonage and backpressure. Ideal for fire protection systems and health hazard cross-connections, this compact and lightweight unit features a 304 stainless steel housing, OSY resilient seated gate valves, and a Z-pattern installation. It includes a GPM meter for leak detection and a flood sensor on the relief valve. Approved by ASSE, UL, FM, AWWA, and CSA B64.4, it offers reliable performance with a maximum working pressure of 175 PSI and easy serviceability. Item number 0111650.

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Connections

  • The assembly features groove end connections for the main housing.
  • Groove fittings are incorporated to allow for integral pipeline adjustment during installation.
  • The shutoff valves are Outside Stem and Yoke (OSY) resilient seated gate valves.
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Additional Details

The Watts Series 957RPDA 2 1/2 inch Reduced Pressure Detector Assembly Backflow Preventer provides protection to potable water systems from contamination due to back-siphonage and backpressure, commonly used in health hazard applications and to monitor unauthorized water use in fire protection systems.

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.

Key Features

  • Features an extremely compact design, 70% lighter than traditional designs
  • Constructed with 304 (Schedule 40) stainless steel housing and sleeve for durability
  • Includes UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves
  • Designed for horizontal Z pattern installation
  • Equipped with a gallon per minute (GPM) meter to detect underground leaks and unauthorized water use from the fire sprinkler system
  • Patented torsion spring check modules provide lowest pressure loss and unmatched ease of serviceability
  • Groove fittings allow integral pipeline adjustment
  • Includes a flood sensor on the relief valve to detect excessive water discharges, with flood alert activated by an add-on connection kit compatible with BMS and cellular networks
  • Bottom mounted cast stainless steel relief valve
  • Replaceable check disc rubber for easy maintenance

Specifications

  • Model Series: 957RPDA
  • Nominal Size: 2 1/2 inch
  • Valve Type: Reduced Pressure Detector Assembly Backflow Preventer
  • Installation Pattern: Z Pattern (Horizontal)
  • Shutoff Valves: OSY (Outside Stem and Yoke) Resilient Seated Gate Valves
  • Meter: Gallons Per Minute (GPM) Meter
  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)

Materials

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

Certificates & Approvals

  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at USC (FCCCHR-USC)
  • AWWA C511-97
  • ASSE 1047
  • CSA B64.4
  • UL Classified
  • FM Approved (for OSY shutoff valves)

FAQs

What is the primary function of the Watts 957RPDA Reduced Pressure Detector Assembly?

This backflow preventer is designed to protect potable water systems from contamination due to back-siphonage and backpressure. It is commonly used in health hazard applications, such as on fire sprinkler systems, and helps monitor unauthorized water use.

What are the main construction materials of this backflow preventer?

The housing and sleeve are made from 304 (Schedule 40) stainless steel. The check discs are reversible silicone or EPDM, and pins, fasteners, and springs are stainless steel.

What type of shutoff valves are included with this assembly?

This model is equipped with UL Classified and FM Approved Outside Stem and Yoke (OSY) resilient seated gate valves, which provide reliable isolation.

Does this backflow preventer have a flood detection feature?

Yes, it includes a flood sensor on the relief valve to detect excessive water discharges. An add-on connection kit is required to activate the flood alert feature, which is compatible with BMS and cellular networks.

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

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

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