8 957ZRPDA-OSY-CFM-FS

Item Number: F111648
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$29,933.88
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 8 inch
  • Weight: 523.0 lb
  • Housing Material: 304 (Schedule 40) Stainless Steel
  • Shutoff Valves: OSY Resilient Seated Gate Valves
  • Pattern: Z Pattern Horizontal Installation
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F – 140°F
  • Features SentryPlus Alert® Flood Sensor
  • Includes Cubic Foot per Minute (CFM) Meter

Description

The Watts 8 inch 957ZRPDA Reduced Pressure Detector Assembly Backflow Preventer offers robust protection for potable water systems against contamination from back-siphonage or backpressure. This Z-pattern assembly features 304 stainless steel construction, UL/FM approved OSY shutoff valves, and a bottom-mounted cast stainless steel relief valve. It includes a SentryPlus Alert flood sensor and a cubic foot per minute meter for detecting leaks and unauthorized water usage. Its compact design and horizontal Z pattern installation provide installation flexibility. Maximum operating pressure is 175 PSI. Item number F111648.

Help Me Connect

This backflow preventer is designed for horizontal Z pattern installation.

The integrated flood sensor with SentryPlus Alert® technology requires an add-on sensor connection kit to activate its flood alert capabilities.

Connection kit options support BMS, cellular communication, or integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details

This 8 inch Watts 957ZRPDA Reduced Pressure Detector Assembly Backflow Preventer is designed to protect potable water systems from contamination due to back-siphonage or backpressure, as well as to monitor unauthorized water use from fire protection systems. It features a Z pattern installation, UL and FM approved OSY shutoff valves, and a cubic foot per minute meter.

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

Features

  • Extremely compact design, 70% lighter than traditional designs
  • 304 (Schedule 40) stainless steel housing and sleeve
  • Groove fittings allow integral pipeline adjustment
  • Patented torsion spring check provides lowest pressure loss and unmatched ease of serviceability
  • Replaceable check disc rubber
  • Bottom mounted cast stainless steel relief valve
  • Metered bypass with cubic foot per minute meter to detect leakage or theft of water
  • Flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve
  • Flood alert feature activated with add-on sensor connection kit
  • Compatible with BMS and cellular network communication, or integration with BAS via RS-485 Modbus or Nexa platform by Wi-Fi
  • UL and FM approved outside stem and yoke resilient seated gate valves

Installation

  • Approved for horizontal Z pattern installation

Specifications

  • Size: 8 inch
  • Model Series: Watts 957ZRPDA
  • Valve Type: Reduced Pressure Detector Assembly Backflow Preventer
  • Housing Material: 304 (Schedule 40) Stainless Steel
  • Housing & Sleeve Material: 304 (Schedule 40) stainless steel
  • Elastomers: EPDM, silicone, Buna 'N'
  • Relief Valve Material: Bottom Mounted Cast Stainless Steel
  • Shutoff Valves: UL Classified and FM Approved Outside Stem and Yoke Resilient Seated Gate Valves
  • Pattern: Z Pattern
  • Flood Sensor: Included, with SentryPlus Alert® technology
  • Meter: Cubic Foot per Minute (CFM)
  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Temperature Range: 33°F – 140°F (0.5°C – 60°C)
  • Springs Material: Stainless Steel
  • Test Cocks Material: Lead Free* Bronze Body
  • Pins & Fasteners Material: 300 Series Stainless Steel

Certificates & Approvals

  • ASSE 1047
  • CSA B64.4
  • UL Classified
  • FM Approved
  • AWWA C511-97

FAQs

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

This Watts 957ZRPDA assembly protects potable water systems from contamination caused by back-siphonage or backpressure in health hazard applications. It also monitors for unauthorized water use in fire protection systems.

What type of installation is suitable for this 8-inch model?

This 8-inch backflow preventer is approved for horizontal Z pattern installation only.

Does this backflow preventer include flood detection?

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

What materials are used for the housing and internal components?

The housing and sleeve are constructed from durable 304 (Schedule 40) stainless steel. Internal components like elastomers are EPDM, silicone, and Buna 'N', while springs are stainless steel.

What are the maximum operating pressure and temperature ratings for this unit?

This assembly has a maximum working pressure of 175 PSI (12.1 bar) and an operating temperature range of 33°F to 140°F (0.5°C to 60°C).

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