8 957RPDA-OSY-GPM-FS

Item Number: F111630
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$23,874.64
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 8 inch
  • Weight: 644.0 lb
  • Housing Material: 304 Stainless Steel
  • Shutoff Valves: UL/FM Approved OSY Resilient Seated Gate Valves
  • Features: SentryPlus Alert® Flood Sensor
  • Meter: Gallons per minute (GPM) included
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Design: Extremely compact and lighter

Description

The Watts 8 inch 957RPDA Reduced Pressure Detector Assembly protects potable water systems from contamination due to backpressure or backsiphonage. This UL and FM approved backflow preventer features a durable 304 stainless steel housing, OSY shutoff valves, and a bottom-mounted cast stainless steel relief valve. It includes a gallons per minute (GPM) meter for leak detection and a SentryPlus Alert® flood sensor to monitor for excessive relief valve discharge, with optional connectivity for remote alerts. Its compact design allows for installation in smaller enclosures, making it an efficient solution for health hazard applications.

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Connections & Compatibility

This Watts 957RPDA assembly features groove end connections for integral pipeline adjustment. The included flood sensor requires an add-on sensor connection kit to activate its flood alert capabilities. These connection kits enable integration with building automation systems (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi connectivity. Compatibility also includes cellular network communication for maintenance alerts.

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Additional Details

This 8 inch reduced pressure detector backflow preventer assembly helps stop the reverse flow of liquids due to backpressure or backsiphonage, where potential health hazard exists. Extremely compact and lighter than traditional designs, it is approved for horizontal installation.

The assembly consists of a 304 (Schedule 40) stainless steel body with a quick access sleeve, torsion spring check valves, UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves, test cocks, and a corrosive resistant bottom mounted cast stainless steel relief valve. It is furnished with a gallons per minute (GPM) meter to detect underground leaks and unauthorized water use.

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.

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. Consult local water authority, building, and plumbing codes before installation.

Specifications

  • Product Type: Reduced Pressure Detector Assembly
  • Series: 957RPDA
  • Size: 8 inch
  • Housing & Sleeve Material: 304 (Schedule 40) stainless steel
  • Shutoff Valves: UL Classified and FM Approved OSY Resilient Seated Gate Valves
  • Check Discs: Reversible silicone or EPDM
  • Elastomers: EPDM, silicone, Buna 'N'
  • Torsion Spring Checks: Noryl®, stainless steel
  • Test Cocks: Lead Free* bronze body
  • Pins & Fasteners: 300 Series stainless steel
  • Springs: Stainless steel
  • Relief Valve: Bottom mounted cast stainless steel
  • Meter: Gallons per minute (GPM)
  • Flood Sensor: Included with SentryPlus Alert® technology
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Installation Orientation: Horizontal

Certificates & Approvals

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

FAQs

What is the primary function of the Watts 957RPDA backflow preventer?

Its primary function is to protect potable water systems from contamination caused by back-siphonage and backpressure, specifically in health hazard applications.

What material is used for the housing and sleeve of this assembly?

The housing and sleeve are constructed from 304 (Schedule 40) stainless steel, offering durability and corrosion resistance.

Does this backflow preventer include a flood detection feature?

Yes, it includes a flood sensor with SentryPlus Alert® technology, designed to detect excessive water discharges from the relief valve. An add-on connection kit is required to activate alert capabilities.

What type of shutoff valves are included with the 957RPDA-OSY model?

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

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 codes.

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