3 957-QT-FS

Item Number: F111761
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$7,976.27
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Weight: 75.0 lb
  • Product Type: Reduced Pressure Zone Assembly
  • Body Material: 304 Stainless Steel
  • Shutoff Valves: Quarter-Turn Ball Valves
  • Max Working Pressure: 175 PSI
  • Flood Sensor: SentryPlus Alert Technology
  • Approvals: AWWA C511-97, ASSE 1013, CSA B64.4, NSF 61-G
  • Design: Compact and lightweight

Description

The Watts Series 957 3 inch Reduced Pressure Zone Assembly is a compact and lightweight backflow preventer designed for health hazard applications. It protects potable water systems from contamination by backsiphonage or backpressure. Key features include a durable 304 stainless steel body, quarter-turn ball valve shutoffs, and replaceable check disc rubber. An integrated flood sensor with SentryPlus Alert technology detects relief valve discharges, providing alerts with an optional connection kit. This assembly is approved for horizontal installation and meets AWWA C511-97, ASSE 1013, CSA B64.4, and NSF 61-G standards. Item number F111761.

Help Me Connect

Installation Orientation

This backflow assembly is approved for horizontal installation. Ensure the assembly is installed in accordance with the direction of the flow arrow for proper operation.

Flood Sensor Connectivity

  • An add-on sensor connection kit is required to activate the flood sensor's advanced alert features. Without this kit, the sensor is passive.
  • With a connection kit, the sensor can integrate with BMS (Building Management Systems) or utilize cellular network communication.
  • When paired with a Sensor Control Monitor, it enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
  • For installing a drain line, use Watts 957AG air gaps and attach the air gap brackets directly onto the flood sensor.
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Additional Details

The Watts Series 957 3 inch Reduced Pressure Zone (RPZ) assembly is designed to protect potable water systems from contamination due to backsiphonage or backpressure in health hazard applications.

This compact and lightweight assembly features a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve, providing early notification of potential flooding events when paired with an add-on connection kit.

Construction & Design

  • Features a 304 (Schedule 40) stainless steel housing and sleeve for durability and corrosion resistance.
  • Includes two independent torsion spring check modules and a bottom-mounted cast stainless steel relief valve.
  • Equipped with quarter-turn ball valve shutoffs for easy operation.
  • Groove couplings allow for integral pipeline adjustment and ease of installation.
  • Designed to be extremely compact and up to 70% lighter than traditional designs.
  • Approved for horizontal installation, ensuring proper alignment with the flow arrow.

Flood Sensor Technology

  • The integrated flood sensor detects continuous discharge from the relief valve.
  • An add-on connection kit is required to activate the flood sensor's alert features; without it, the sensor acts as a passive component.
  • Compatible with BMS (Building Management Systems) and cellular network communication when an add-on sensor connection kit is used.
  • Can integrate with a Sensor Control Monitor for alerts via RS-485 Modbus or the Nexa® platform through Wi-Fi.

Use of the flood sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including the need to provide proper drainage in the event of a discharge.

Specifications

  • Size: 3 inch
  • Product Type: Reduced Pressure Zone Assembly
  • Body Material: 304 (Schedule 40) Stainless Steel
  • Shutoff Valves: Quarter-Turn Ball Valves
  • Check Disc Material: Reversible Silicone or EPDM
  • Elastomers: EPDM, Silicone, Buna-N
  • Torsion Spring Checks Material: Noryl®, Stainless Steel
  • Test Cocks Material: Lead Free* Bronze Body
  • Pins & Fasteners Material: 300 Series Stainless Steel
  • Springs Material: Stainless Steel
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)
  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Flood Sensor: Integrated with SentryPlus Alert® Technology
  • Installation Orientation: Horizontal

Certificates & Approvals

  • AWWA C511-97
  • ASSE 1013
  • CSA B64.4
  • NSF Certified to NSF/ANSI 61-G
  • Approved by 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 Series 957 Reduced Pressure Zone Assembly?

The primary function is to protect potable water systems from contamination due to backsiphonage or backpressure, particularly in health hazard applications.

How does the integrated flood sensor work?

The flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. When an add-on connection kit is used, it can trigger alerts to facility personnel or integrate with building management systems.

What materials are used in the construction of this backflow preventer?

The housing and sleeve are made from 304 (Schedule 40) stainless steel. Elastomers are EPDM, silicone, and Buna-N. Check discs are reversible silicone or EPDM, and test cocks are Lead Free* bronze.

Is an add-on kit required for the flood sensor to function?

Yes, an add-on connection kit is required to activate the flood sensor's advanced alert features and communication capabilities. Without it, the sensor is a passive component and will not communicate with other devices.

What are the installation requirements for this assembly?

This backflow assembly is approved for horizontal installation. It must be installed in accordance with the direction of the flow arrow and all local codes and regulations.

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