3 957N-BFG-FS

Item Number: F111781
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$12,063.10
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • 3 inch size for N-pattern installation
  • Weight: 92.0 lb
  • Reduced Pressure Zone (RPZ) Assembly
  • 304 (Schedule 40) Stainless Steel Housing
  • UL & FM Approved Grooved Butterfly Valve Shutoffs
  • Flood Sensor with SentryPlus Alert technology
  • Maximum Operating Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Lead Free* Bronze Test Cocks

Description

The Watts 3 inch 957N-BFG-FS Reduced Pressure Zone (RPZ) backflow preventer provides robust protection for potable water systems against contamination from backpressure or backsiphonage, where potential health hazards exist. Featuring a compact 304 stainless steel housing and UL/FM approved grooved gear-operated butterfly valve shutoffs, it's designed for horizontal N-pattern installation. A built-in flood sensor with SentryPlus Alert technology detects excessive relief valve discharge, relaying alerts when paired with an add-on connection kit. With a maximum working pressure of 175 PSI, this assembly offers reliable performance and ease of serviceability.

Help Me Connect

Installation Orientation

This backflow preventer is designed for horizontal N pattern installation. Ensure the assembly is installed in accordance with the direction of the flow arrow for proper function.

Connections

  • This assembly utilizes groove couplings on both the inlet and outlet for ease of installation and pipeline alignment into your system.
  • For flood sensor activation and extended monitoring capabilities, an add-on sensor connection kit (sold separately) is required.
  • The flood sensor can integrate with a Sensor Control Monitor for alerts to BAS via RS-485 Modbus or the Nexa platform via Wi-Fi.
  • When installing a drain line on this Series 957 backflow preventer, use 957AG air gaps.
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Additional Details

This 3 inch reduced pressure zone assembly backflow preventer helps stop the reverse flow of liquids due to backpressure or backsiphonage, where potential health hazards exist. This extremely compact and lighter than a traditional designed assembly is approved for horizontal N pattern installation, provided it is installed in accordance with the direction of the flow arrow.

Features

  • Features a flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve
  • 304 (Schedule 40) stainless steel housing and sleeve
  • Equipped with UL and FM approved grooved gear operated butterfly valve shutoffs with tamper switches
  • Replaceable check disc rubber
  • Bottom mounted cast stainless steel relief valve
  • Compact design allows small enclosures to be used
  • Groove couplings for ease of installation and pipe alignment
  • Includes torsion spring check valves and test cocks

Flood Sensor Technology

  • Detects excessive water discharges from the relief valve
  • Add-on sensor connection kit extends flood monitoring on compatible assemblies (sold separately)
  • Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity

Specifications

  • Size: 3 inch
  • Orientation: N-Pattern (Horizontal)
  • Assembly Type: Reduced Pressure Zone (RPZ)
  • Shutoff Valves: UL Classified and FM Approved Grooved Gear Operated Butterfly Valves with Tamper Switch

Materials

  • Housing & Sleeve Material: 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

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

Certificates & Approvals

  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • AWWA C511-97
  • ASSE 1013
  • CSA B64.4
  • cULus Classified
  • FM Approved
  • NSF Certified to NSF/ANSI 61-G

FAQs

What is the primary purpose of this backflow preventer?

This backflow preventer is designed to protect potable water systems from contamination caused by backpressure or backsiphonage, which can create health hazards.

What type of shutoff valves are included with this assembly?

It features UL Classified and FM Approved grooved gear operated butterfly valves with tamper switches for reliable control.

What material is the housing made from?

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

How does the flood sensor function?

The integrated flood sensor with SentryPlus Alert technology detects continuous discharge from the relief valve. When an add-on connection kit is used, it can relay alerts for potential flooding events.

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

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

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