6 LF957RPDA-OSY-GPM-FS

Item Number: F122727
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$14,631.11
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 6 inch
  • Weight: 423.0 lb
  • Lead Free* Construction
  • Housing Material: 304 Stainless Steel
  • Maximum Operating Pressure: 175 PSI
  • Temperature Range: 33°F - 110°F
  • UL Classified & FM Approved OSY Shutoff Valves
  • SentryPlus Alert® Flood Sensor Integrated
  • Gallon per minute bypass meter

Description

The Watts 6 inch LF957RPDA-OSY-GPM-FS Lead Free Reduced Pressure Detector Backflow Preventer Assembly safeguards potable water systems from contamination caused by backpressure or backsiphonage in health hazard applications. Ideal for fire protection systems, it includes a gallon per minute meter to detect leaks or unauthorized water use. Its robust 304 stainless steel construction, compact design, and UL/FM approved OSY shutoff valves ensure durability and reliable performance. An integrated SentryPlus Alert® flood sensor provides early detection of relief valve discharges, helping prevent costly damage. Item number F122727.

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Connections

This 6 inch Reduced Pressure Detector Backflow Preventer Assembly features UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves at its inlet and outlet. The main housing is constructed with groove end connections. Depending on the specific configuration, the OSY gate valves can feature flanged or grooved ends to connect to your pipeline. For precise connection details, it is recommended to consult the product's full installation instructions or the specific model configuration.

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Additional Details

This 6 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly provides protection to potable water systems from contamination in health hazard applications, preventing reverse flow due to backpressure or backsiphonage. It also monitors for unauthorized water use within fire protection systems. This assembly features an integrated flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.

Construction & Features

  • Features Lead Free* construction, with a wetted surface containing less than 0.25% lead by weight.
  • Extremely compact design and approximately 70% lighter than traditional backflow preventer designs.
  • Main housing and sleeve constructed from 304 (Schedule 40) stainless steel for durability.
  • Groove fittings allow for integral pipeline adjustment.
  • Patented torsion spring check provides the lowest pressure loss.
  • Unmatched ease of serviceability with replaceable check disc rubber.
  • Includes UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves.
  • Furnished with a gallon per minute meter for detecting underground leaks and unauthorized water usage.
  • The assembly is approved for horizontal installation.

Flood Detection System

  • Includes a flood sensor with SentryPlus Alert® technology integrated on the relief valve to detect continuous discharge.
  • When paired with an add-on sensor connection kit (sold separately), the sensor is activated to relay alerts for potential flooding events.
  • Connection kit options include compatibility with BMS (Building Management Systems), cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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. 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 the need to provide proper drainage in the event of a discharge.

Specifications

  • Product Type: Reduced Pressure Detector Backflow Preventer Assembly
  • Size: 6 inch
  • Construction: Lead Free*
  • Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Shutoff Valves: UL Classified and FM Approved OSY Resilient Seated Gate Valves
  • 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
  • Bypass Meter: Gallon per minute (GPM)
  • Flood Sensor: SentryPlus Alert® Technology

Performance Data

  • Temperature Range: 33°F - 110°F (0.5°C - 43°C)
  • Maximum Working Pressure: 175 PSI (12.1 bar)

Certificates & Approvals

  • ASSE 1047
  • AWWA C511-97
  • CSA B64.4
  • UL Classified
  • FM Approved
  • NSF/ANSI 372 Certified
  • Foundation for Cross-Connection Control and Hydraulic Research (FCCCHR-USC) Approved (excluding 6", 8", and 10" N- and Z-pattern installations)

FAQs

What is the primary purpose of the Watts LF957RPDA-OSY-GPM-FS backflow preventer?

This assembly is designed to protect potable water systems from contamination due to backpressure or backsiphonage, especially in health hazard applications and fire protection systems. It also monitors for unauthorized water use.

What does "Lead Free" construction mean for this product?

"Lead Free" means that the wetted surface of this product, which comes into contact with consumable water, contains less than 0.25% of lead by weight, complying with Lead Free* installation requirements.

How does the integrated flood sensor work?

The flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. When paired with an optional add-on connection kit, it can relay alerts to facility personnel or connected systems like BMS via Wi-Fi or cellular communication.

What type of shutoff valves are included with this assembly?

This model comes with UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves for reliable isolation.

What is the maximum operating pressure and temperature for this backflow preventer?

The maximum working pressure is 175 PSI (12.1 bar), and the operating temperature range is 33°F to 110°F (0.5°C to 43°C).

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