3 957-DOSY-FS

Item Number: F113041
1 1
$9,439.44
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Weight: 225.0 lb
  • Protection Type: Reduced Pressure Zone (RPZ)
  • Housing Material: 304 (Schedule 40) Stainless Steel
  • Shutoff Valves: UL & FM Approved OSY Resilient Seated Gate Valves
  • Features: SentryPlus Alert Flood Sensor
  • Maximum Operating Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Certifications: AWWA C511-97, ASSE 1013, CSA B64.4, cULus, FM, NSF/ANSI 61-G

Description

The Watts Series 957 3 inch Reduced Pressure Zone (RPZ) backflow preventer protects potable water systems from contamination caused by backpressure or backsiphonage in health hazard applications. Featuring a durable 304 stainless steel housing and sleeve, this assembly is equipped with UL and FM approved OSY resilient seated gate valves. A SentryPlus Alert flood sensor detects excessive relief valve discharge, with activation available via an optional add-on connection kit for various communication systems. Its compact, lightweight design and groove couplings make installation and serviceability efficient. This Lead Free* device is certified to AWWA C511-97, ASSE 1013, CSA B64.4, cULus, FM, and NSF/ANSI 61-G standards, ensuring reliable performance up to 175 PSI.

Help Me Connect

This Watts Series 957 Reduced Pressure Zone assembly features groove couplings for straightforward installation and pipeline alignment. To activate the integral flood sensor's alert capabilities, an add-on sensor connection kit is required. These kits support various communication methods including BMS, cellular communication, or the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa platform through Wi-Fi.

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Additional Details

The Watts Series 957 Reduced Pressure Zone (RPZ) backflow preventer is a 3 inch assembly designed to protect potable water systems from contamination due to backsiphonage or backpressure, particularly in health hazard applications. Its extremely compact and lightweight design allows for installation in smaller enclosures.

This assembly features a flood sensor with SentryPlus Alert technology that detects excessive water discharges from the relief valve. When paired with an optional add-on connection kit, the sensor can relay alerts for potential flooding events to facility personnel, helping to prevent costly water damage.

Key Features

  • Provides potable water system protection against contamination from backsiphonage and backpressure.
  • Equipped with a flood sensor with SentryPlus Alert technology for discharge detection.
  • Sensor alerts can be activated with an optional add-on connection kit (BMS, cellular, or Sensor Control Monitor for BAS/Nexa Wi-Fi).
  • Constructed with a 304 (Schedule 40) stainless steel housing and sleeve for durability.
  • Includes UL and FM approved outside stem and yoke (OSY) resilient seated gate valves.
  • Features a bottom mounted cast stainless steel relief valve.
  • Extremely compact design, 70% lighter than traditional models.
  • Patented torsion spring check modules ensure ease of serviceability and lowest pressure loss.
  • Groove couplings facilitate easy installation and pipeline adjustment.
  • Approved for horizontal installation.

The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight, meeting "Lead Free" requirements.

Specifications

General

  • Product Type: Reduced Pressure Zone (RPZ) Backflow Preventer
  • Series: 957
  • Size: 3 inch
  • Shutoff Valve Type: Outside Stem and Yoke (OSY) Resilient Seated Gate Valves
  • Orientation: Horizontal

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 The University of Southern California (FCCCHR-USC)
  • Standard: AWWA C511-97
  • Standard: ASSE 1013
  • Standard: CSA B64.4
  • Classification: cULus Classified (BFG & OSY Only)
  • Approval: FM Approved (BFG & OSY Only)
  • Certification: NSF Certified to NSF/ANSI 61-G
  • Lead Free*: Less than 0.25% lead by weight on wetted surfaces

FAQs

What is the primary function of the Watts Series 957 RPZ backflow preventer?

Its primary function is to protect potable water systems from contamination due to reverse flow (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. To activate its notification capabilities, an optional add-on connection kit must be installed.

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

The housing and sleeve are constructed from durable 304 (Schedule 40) stainless steel, ensuring longevity and resistance to corrosion.

What are the main approvals and certifications for this Watts 957 series RPZ?

This RPZ is approved by FCCCHR-USC and certified to AWWA C511-97, ASSE 1013, CSA B64.4, cULus, FM, and NSF/ANSI 61-G standards.

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

The backflow preventer has a maximum operating 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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