2.5 957-QT-FS

Item Number: F111760
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$6,517.96
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 2 1/2 inch
  • Weight: 64.0 lb
  • Housing Material: 304 Stainless Steel
  • Maximum Operating Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Shutoff Type: Quarter-Turn Ball Valves
  • Flood Sensor: SentryPlus Alert® technology for discharge detection
  • Certifications: UL, FM, ASSE 1013, CSA B64.4, NSF/ANSI 61-G
  • Lead Free: Wetted surface < 0.25% lead

Description

The Watts Series 957 Reduced Pressure Zone (RPZ) backflow preventer, 2 1/2 inch, provides critical protection to potable water systems from contamination caused by backpressure or backsiphonage. This assembly features a durable 304 stainless steel housing, quarter-turn ball valves, and an integrated SentryPlus Alert® flood sensor to detect excessive water discharge. Designed for horizontal installation, it offers a compact, lightweight design for easy placement. Approved by UL, FM, ASSE 1013, AWWA C511-97, CSA B64.4, and NSF/ANSI 61-G, it ensures reliable performance up to 175 PSI within a 33°F to 140°F temperature range.

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Installation & Connectivity

  • This assembly is approved for horizontal installation, ensuring it is installed in accordance with the direction of the flow arrow.
  • Features groove couplings for ease of installation and integral pipe alignment in pipelines.
  • An add-on sensor connection kit is required to activate the flood sensor's communication capabilities. Without this kit, the sensor functions as a passive component.
  • Connection kit options allow for compatibility with BMS (Building Management Systems) and cellular network communication.
  • The optional Sensor Control Monitor enables integration with BAS (Building Automation Systems) via RS-485 Modbus or the Nexa® platform through Wi-Fi.
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Additional Details

This 2 1/2 inch reduced pressure zone assembly backflow preventer helps stop the reverse flow of liquids due to backpressure or backsiphonage, particularly where potential health hazards exist. It provides protection to the potable water system in accordance with national plumbing codes.

This extremely compact and lighter than traditional designed assembly is approved for horizontal installation and includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.

Features

  • Provides protection to the potable water system from contamination in health hazard applications.
  • Includes a flood sensor with SentryPlus Alert® technology to detect continuous discharge from the relief valve.
  • Add-on sensor connection kit to activate flood monitoring and relay alerts.
  • Integrates with Sensor Control Monitor to deliver maintenance alerts to Building Automation Systems (BAS) via RS-485 Modbus or the Nexa® platform via Wi-Fi connectivity.
  • Constructed with a 304 (Schedule 40) stainless steel housing and sleeve.
  • Features UL Classified and FM Approved outside stem and yoke resilient seated gate valves.
  • Includes replaceable check disc rubber and a bottom mounted cast stainless steel relief valve.
  • Extremely compact design, up to 70% lighter than traditional designs, allowing for smaller enclosures.
  • Groove couplings for ease of installation and integral pipeline adjustment.
  • Patented torsion spring checks provide lowest pressure loss and unmatched ease of serviceability.
  • "Lead Free" designation, with wetted surfaces containing less than 0.25% lead by weight.
  • Available with quarter-turn ball valve shutoffs for sizes 2 1/2", 3", and 4".

Specifications

  • Product Type: Reduced Pressure Zone Assembly
  • Model: 957-QT-FS
  • Nominal Size: 2 1/2 inch
  • Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Elastomers: EPDM, Silicone, Buna-N
  • Torsion Spring Checks Material: Noryl®, Stainless Steel
  • Check Discs Material: Reversible Silicone or EPDM
  • Test Cocks Body Material: Lead Free* Bronze
  • Pins & Fasteners Material: 300 Series Stainless Steel
  • Springs Material: Stainless Steel
  • Shutoff Type: Quarter-Turn Ball Valves
  • Flood Sensor: Included, SentryPlus Alert® technology
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)
  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Lead Content: Wetted surface contains less than 0.25% lead by weight

Certificates & Approvals

  • Approved By: Foundation for Cross-Connection Control and Hydraulic Research (FCCCHR-USC)
  • Standards: AWWA C511-97
  • Certification: ASSE 1013
  • Certification: CSA B64.4
  • Certification: UL Classified (**BFG & OSY Only)
  • Certification: FM Approved (**BFG & OSY Only)
  • Certification: NSF Certified to NSF/ANSI 61-G

FAQs

What is the primary function of the Watts 957-QT-FS backflow preventer?

Its primary function is to protect potable water systems from contamination caused by backpressure or backsiphonage, especially in health hazard applications, by preventing the reverse flow of liquids.

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

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

Does this model include a flood sensor, and how does it function?

Yes, this model includes a flood sensor with SentryPlus Alert® technology. It detects excessive water discharges from the relief valve and can relay alerts when paired with an add-on connection kit.

What are the key certifications and approvals for the Watts 957-QT-FS?

It is approved by FCCCHR-USC and certified to AWWA C511-97, ASSE 1013, CSA B64.4, UL Classified, FM Approved, and NSF/ANSI 61-G, ensuring compliance with industry standards.

What type of shutoff valves are included with this 2 1/2 inch assembly?

The 2 1/2 inch assembly is equipped with quarter-turn ball valve shutoffs, which are designed for easy operation and reliable flow control.

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