6 957-DOSY-FS

Item Number: F113043
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$16,603.62
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 6 inch
  • Weight: 420.0 lb
  • Housing Material: 304 (Schedule 40) Stainless Steel
  • Includes Flood Sensor with SentryPlus Alert® Technology
  • Shutoff Valves: Domestic OSY Resilient Seated Gate Valves
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Certifications: ASSE 1013, CSA B64.4, UL Classified, FM Approved, NSF/ANSI 61-G
  • Compact Design: 70% Lighter than traditional models

Description

The Watts 6 inch Series 957 Reduced Pressure Zone (RPZ) Backflow Preventer protects potable water systems from contamination due to backpressure or backsiphonage. This assembly features a durable 304 (Schedule 40) stainless steel housing and sleeve, along with domestic OSY resilient seated gate valves. It includes a SentryPlus Alert® flood sensor to detect continuous relief valve discharge, with add-on kit compatibility for BMS, cellular, or Wi-Fi integration. Its compact, lightweight design allows for easier installation in confined spaces. Certified by ASSE 1013, CSA B64.4, UL, FM, NSF, and AWWA, it operates up to 175 PSI and 140°F. Item number F113043.
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Additional Details

This 6 inch Reduced Pressure Zone (RPZ) assembly backflow preventer helps stop the reverse flow of liquids due to backpressure or backsiphonage, particularly where potential health hazards exist in the potable water system.

Features

  • Provides protection against contamination from backpressure and backsiphonage in health hazard applications.
  • Extremely compact design is 70% lighter than traditional models, allowing for use in smaller enclosures.
  • Includes a flood sensor with SentryPlus Alert® technology to detect continuous discharge from the relief valve.
  • Flood alerts are activated with an add-on sensor connection kit, compatible with BMS and cellular network communication.
  • Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi connectivity (with add-on kit).
  • Features domestic outside stem and yoke (OSY) resilient seated gate valves for dependable shutoff.
  • Patented torsion spring check modules provide lowest pressure loss and unmatched ease of serviceability.
  • Groove couplings facilitate ease of installation and pipe alignment.

Construction

  • Housing and sleeve are constructed from 304 (Schedule 40) stainless steel pipe.
  • Features corrosion-resistant stainless steel bottom mounted pressure relief valve.
  • Equipped with drip tight shutoff valves and torsion spring check modules with replaceable elastomer discs.
  • Approved for horizontal installation in accordance with the direction of the flow arrow.

NOTICE: An add-on connection kit is required to activate the flood sensor. Without the connection kit, the sensor is a passive component that has no communication with any other device.

Specifications

  • Size: 6 inch

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

Pressure & Temperature

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

Certificates & Approvals

  • ASSE: 1013
  • CSA: B64.4
  • UL Classified: Yes (BFG & OSY Only)
  • FM Approved: Yes (BFG & OSY Only)
  • NSF: NSF/ANSI 61-G
  • AWWA: C511-97
  • FCCCHR-USC: Approved

FAQs

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

This 6 inch Reduced Pressure Zone (RPZ) assembly is designed to protect potable water systems from contamination by preventing the reverse flow of liquids caused by backpressure or backsiphonage, particularly in health hazard applications.

Does this backflow preventer include a flood sensor?

Yes, it features a flood sensor with SentryPlus Alert® technology. This sensor detects excessive water discharges from the relief valve, providing an alert for potential flooding events when paired with an add-on connection kit.

What materials are primarily used in the construction of this assembly?

The housing and sleeve are constructed from 304 (Schedule 40) stainless steel. Key components like elastomers are EPDM, silicone, and Buna-N, while test cocks feature a Lead Free* bronze body.

What type of shutoff valves are included with this backflow preventer?

The assembly comes with domestic outside stem and yoke (OSY) resilient seated gate valves, which are also UL Classified and FM Approved for reliable shutoff.

What are the operating pressure and temperature limits for this device?

This backflow preventer is rated for a maximum working pressure of 175 PSI (12.1 bar) and can operate within a temperature range of 33°F to 140°F (0.5°C to 60°C).

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