3 957Z-BFG-FS

Item Number: F111785
1 1
$12,063.74
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Weight: 87.0 lb
  • Pattern: Z-pattern
  • Shutoff Type: Grooved Gear Operated Butterfly Valves with Tamper Switch
  • Housing Material: 304 (Schedule 40) Stainless Steel
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Flood sensor with SentryPlus Alert technology
  • cULus Classified and FM Approved

Description

The Watts Series 957Z-BFG-FS is a 3-inch reduced pressure zone backflow preventer engineered for health hazard applications, protecting potable water from backsiphonage and backpressure. It features a compact, lightweight 304 stainless steel body, grooved gear-operated butterfly valve shutoffs, and a Z-pattern configuration. An integrated flood sensor with SentryPlus Alert technology detects continuous relief valve discharge, with optional connectivity to BMS, cellular networks, or the Nexa platform for alerts. Rated for 175 PSI maximum working pressure, this assembly is cULus Classified, FM Approved, and NSF certified to NSF/ANSI 61-G, ensuring reliable and compliant operation. Item number F111785.

Help Me Connect

This Watts Series 957Z-BFG-FS Reduced Pressure Zone Assembly is designed for Z-pattern horizontal installation. Its groove fittings allow for integral pipeline adjustment, simplifying installation with grooved piping systems.

The integrated flood sensor comes with SentryPlus Alert technology. To activate its full alert capabilities and communicate with other systems, an add-on sensor connection kit is required. These kits enable compatibility with:

  • Building Management Systems (BMS)
  • Cellular network communication
  • Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa platform via Wi-Fi.

When installing a drain line for this backflow preventer, ensure you use Watts 957AG air gaps and attach the air gap brackets directly onto the flood sensor for proper drainage.

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Additional Details

The Watts Series 957 Reduced Pressure Zone assembly is a 3-inch backflow preventer designed to protect potable water systems from contamination due to backpressure or backsiphonage, especially in health hazard applications. This compact and lightweight assembly features grooved gear-operated butterfly valve shutoffs and a Z-pattern orientation for installation.

It includes an integrated flood sensor with SentryPlus Alert technology on the relief valve to detect continuous discharge, helping to prevent costly flooding. With an optional add-on connection kit, the sensor can relay alerts for proactive corrective action.

Features

  • Provides protection against backsiphonage and backpressure contamination in potable water systems.
  • Integrated flood sensor with SentryPlus Alert technology detects excessive water discharges from the relief valve.
  • Connects to add-on kits for communication with BMS, cellular networks, or Nexa platform via Wi-Fi.
  • Extremely compact design and 70% lighter than traditional assemblies.
  • Durable 304 (Schedule 40) stainless steel housing and sleeve.
  • Groove fittings for easy installation and integral pipeline adjustment.
  • Patented torsion spring checks ensure lowest pressure loss and unmatched ease of serviceability.
  • Features grooved gear-operated butterfly valve shutoffs with tamper switch.
  • Equipped with a corrosive resistant stainless steel bottom mounted pressure relief valve.
  • Lead Free* construction, containing less than 0.25% lead by weight on wetted surfaces.

NOTICE: An add-on connection kit is required to activate the flood sensor's alert features. Without the kit, the sensor operates as a passive component with no external communication.

Specifications

General

  • Product Type: Reduced Pressure Zone Assembly
  • Nominal Size: 3 inch
  • Pattern: Z-pattern
  • Shutoff Type: Grooved Gear Operated Butterfly Valves with Tamper Switch
  • Flood Sensor: Integrated with SentryPlus Alert Technology
  • Lead Free: Yes (wetted surfaces < 0.25% lead)

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

Performance

  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)

Certificates & Approvals

  • Approved By: Foundation for Cross-Connection Control and Hydraulic Research at USC (FCCCHR-USC)
  • Standard: AWWA C511-97
  • Standard: ASSE 1013
  • Standard: CSA B64.4
  • Classification: cULus Classified
  • Approval: FM Approved
  • Certification: NSF Certified to NSF/ANSI 61-G

FAQs

What is the primary function of the Watts Series 957 Reduced Pressure Zone Assembly?

Its primary function is to protect potable water systems from contamination caused by backsiphonage or backpressure, especially in health hazard applications.

Does this backflow preventer include a flood sensor?

Yes, it includes an integrated flood sensor with SentryPlus Alert technology on the relief valve to detect excessive water discharges.

Is an additional kit required to enable flood sensor alerts?

Yes, an add-on sensor connection kit is required to activate the flood sensor's alert features and enable communication with external systems like BMS or cellular networks.

What type of shutoff valves does this 3-inch model use?

This 3-inch Z-pattern model (957Z-BFG-FS) uses UL Classified and FM Approved grooved gear-operated butterfly valves with tamper switches.

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

The maximum working pressure for this assembly is 175 PSI (12.1 bar), and the temperature range is 33°F to 140°F (0.5°C to 60°C).

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