6 LF957RPDA-OSY-CFM-FS

Item Number: F122722
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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: 448.0 lb
  • Lead Free Construction: Less than 0.25% lead by weight
  • Housing Material: 304 Stainless Steel
  • Shutoff Valves: UL/FM Approved OSY Resilient Seated Gate Valves
  • Pressure Rating: 175 PSI Maximum
  • Temperature Range: 33°F - 110°F
  • Flood Sensor: SentryPlus Alert® Technology Included
  • Bypass Meter: Cubic Feet Meter for Leak Detection

Description

This 6-inch Watts LF957RPDA Reduced Pressure Detector Assembly with OSY shutoff valves and a cubic feet meter provides critical protection for potable water systems. It prevents contamination from backpressure and backsiphonage in health hazard applications, and monitors for unauthorized water use. Constructed with durable 304 stainless steel and featuring a compact, lightweight, lead-free design, it includes a flood sensor with SentryPlus Alert technology to detect excessive relief valve discharge. Approved for horizontal installation, this assembly offers reliable performance with a maximum working pressure of 175 PSI.

Help Me Connect

The Watts 6 inch LF957RPDA Reduced Pressure Detector Assembly features 150 pound ANSI/AWWA Class D flanged end connections on its UL Classified and FM Approved outside stem and yoke (OSY) shutoff valves. The main backflow preventer body connects to the system via groove fittings, allowing for integral pipeline adjustment. To activate the built-in flood sensor for alert capabilities, an add-on sensor connection kit is required. These kits provide compatibility with Building Management Systems (BMS), cellular networks, and enable integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details

The Watts 6 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly, Series LF957RPDA, protects potable water systems from contamination due to backpressure or backsiphonage, particularly in health hazard applications. This assembly also monitors for unauthorized water use from fire protection systems and includes a flood sensor to detect excessive water discharges.

Key Features

  • Lead Free Construction: Wetted surfaces contain less than 0.25% lead by weight, complying with Lead Free* installation requirements.
  • Compact and Lightweight Design: Extremely compact and up to 70% lighter than traditional designs, allowing for installation in smaller enclosures.
  • Flood Sensor with SentryPlus Alert Technology: Detects continuous discharge from the relief valve and, when activated with an add-on connection kit, relays alerts to facility personnel.
  • Durable Construction: Features 304 (Schedule 40) stainless steel housing and sleeve for corrosion resistance.
  • Efficient Check Valves: Two independent torsion spring check modules provide the lowest pressure loss and drip-tight closure against reverse flow. They feature reversible elastomer discs and replaceable check disc rubber for unmatched ease of serviceability.
  • OSY Shutoff Valves: Includes UL Classified and FM Approved 150 pound ANSI/AWWA Class D flanged outside stem and yoke resilient seated gate valves.
  • Cubic Feet Meter: Integrated bypass assembly with a meter to detect underground leaks and unauthorized water use.
  • Bottom Mounted Relief Valve: Reduces clearance requirements, allowing for installation against outside walls.
  • Groove Fittings: Allow for integral pipeline adjustment.

An add-on connection kit is required to activate the flood sensor's communication features. Without the kit, the sensor is a passive component. Watts is not responsible for alert failures due to connectivity issues, power outages, or improper installation.

Specifications

  • Product Type: Reduced Pressure Detector Assembly
  • Series: LF957RPDA
  • Size: 6 inch
  • Lead Free: Yes (less than 0.25% lead by weight)
  • Housing & Sleeve Material: 304 (Schedule 40) stainless steel
  • Shutoff Valves: UL Classified and FM Approved 150 pound ANSI/AWWA Class D flanged outside stem and yoke (OSY), resilient seated gate valves
  • Relief Valve: Bottom mounted, cast stainless steel
  • Bypass Meter: Cubic Feet Meter (CFM)
  • Flood Sensor: SentryPlus Alert® technology, included
  • 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
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F - 110°F (0.5°C - 43°C)
  • Installation Pattern: Horizontal

Certifications and Approvals

  • ASSE: 1047
  • CSA: B64.4
  • UL Classified: Yes (with OSY valves)
  • FM Approved: Yes (with OSY valves)
  • NSF: NSF/ANSI 372
  • AWWA: C511-97
  • FCCCHR-USC Approval: Yes (excluding 6", 8", and 10" N- and Z-pattern installations)

FAQs

What is the primary function of the Watts LF957RPDA assembly?

Its primary function is to protect potable water systems from contamination caused by backpressure or backsiphonage in health hazard applications. It also monitors for unauthorized water use.

What is the purpose of the integrated flood sensor?

The flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. When an add-on connection kit is used, it can relay alerts to facility personnel or management systems.

Is this backflow preventer assembly suitable for horizontal installation?

Yes, the Watts LF957RPDA Reduced Pressure Detector Assembly is approved for horizontal pattern installation.

What type of shutoff valves does this assembly use?

This assembly comes with UL Classified and FM Approved 150 pound ANSI/AWWA Class D flanged outside stem and yoke (OSY) resilient seated gate valves.

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

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

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