6 957N-OSY-FS

Item Number: F111593
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$21,520.74
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 6 inch
  • Weight: 520.0 lb
  • Valve Type: OSY Resilient Seated Gate Valves
  • Housing Material: 304 Stainless Steel
  • Orientation: N-Pattern (Horizontal)
  • Flood sensor with SentryPlus Alert technology
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Groove couplings for easy installation

Description

The Watts 6 inch Series 957 Reduced Pressure Zone (RPZ) backflow preventer provides critical protection against backpressure and backsiphonage contamination in potable water systems. This N-pattern, OSY shutoff valve assembly is constructed from durable 304 stainless steel and features groove couplings for simple installation. It includes a SentryPlus Alert flood sensor for detecting relief valve discharge, enhancing system safety. Rated for up to 175 PSI and temperatures from 33°F to 140°F, it is a compact, lightweight, and serviceable solution for health hazard applications. Item F111593.

Help Me Connect

Installation Orientation

  • This Watts Series 957 backflow preventer is approved for horizontal N pattern installation. Ensure the assembly is installed in accordance with the direction of the flow arrow for proper function.
  • It features grooved inlet gate connections and grooved outlet gate connections for easy integration into existing pipelines.

Drainage and Sensor Connection

  • When installing a drain line on this Series 957 backflow preventer, use 957AG air gaps. Attach the air gap brackets directly onto the flood sensor for optimal performance.
  • An add-on sensor connection kit is required to activate the flood sensor's alert features for BMS, cellular communication, or integration with a Sensor Control Monitor for BAS via RS-485 Modbus or Nexa platform by Wi-Fi.
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Additional Details

The Watts Series 957 6 inch Reduced Pressure Zone (RPZ) backflow preventer provides critical protection for potable water systems from contamination due to backsiphonage or backpressure in health hazard applications. This compact and lightweight assembly features OSY shutoff valves and an N pattern orientation, approved for horizontal installation.

Key Features

  • Equipped with a flood sensor featuring SentryPlus Alert technology to detect continuous discharge from the relief valve.
  • Housed in a durable 304 (Schedule 40) stainless steel body and sleeve.
  • Features UL and FM Approved outside stem and yoke (OSY) resilient seated gate valves.
  • Includes replaceable check disc rubber and a bottom mounted cast stainless steel relief valve.
  • Designed with groove couplings for simplified installation and pipeline adjustment.
  • Patented torsion spring checks for lowest pressure loss and unmatched ease of serviceability.
  • Overall compact design is 70% lighter than traditional designs, allowing for smaller enclosures.

Flood Sensor Technology

  • The integrated flood sensor is designed to detect excessive water discharges from the relief valve, relaying a signal for corrective action and limiting potential flooding.
  • An add-on sensor connection kit is required to activate flood alerts. Without this kit, the sensor is a passive component.
  • Compatible with BMS (Building Management Systems) and cellular network communication via an add-on connection kit.
  • With the Sensor Control Monitor, it delivers maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity.

Use of the flood sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including providing proper drainage in the event of a discharge.

Specifications

  • Series: 957
  • Size: 6 inch
  • Connection Type: Grooved Inlet and Outlet
  • Valve Type: Outside Stem and Yoke (OSY) Resilient Seated Gate Valves
  • Orientation: N-Pattern (Horizontal)
  • Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Elastomer Material: EPDM, Silicone, Buna-N
  • Torsion Spring Checks Material: Noryl®, Stainless Steel
  • Check Disc Material: Reversible Silicone or EPDM
  • Test Cock Material: Lead Free* Bronze Body
  • Pins & Fasteners Material: 300 Series Stainless Steel
  • Spring Material: Stainless Steel
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Weight: 339 lb (154 kg)

Certificates & Approvals

  • Approved by 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 function of the Watts Series 957 backflow preventer?

The primary function is to protect potable water systems from contamination due to reverse flow caused by backsiphonage or backpressure, particularly in health hazard applications.

Does this backflow preventer include a flood sensor?

Yes, it includes a flood sensor with SentryPlus Alert technology designed to detect excessive water discharges from the relief valve. An add-on connection kit is required to activate its full alert capabilities.

What are the key materials used in the construction of this backflow preventer?

The housing and sleeve are made from 304 (Schedule 40) stainless steel. Elastomers include EPDM, silicone, and Buna-N. Test cocks are made from Lead Free* bronze body.

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

This backflow preventer has a maximum working pressure of 175 psi (12.1 bar) and an operating temperature range of 33°F to 140°F (0.5°C to 60°C).

How does the flood sensor communicate alerts?

When paired with an add-on connection kit, the flood sensor can relay alerts through BMS, cellular communication, or integrate with a Sensor Control Monitor for BAS via RS-485 Modbus or the Nexa platform by Wi-Fi.

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