6 LF866-DOSY-LM-FS

Item Number: F683189
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$24,417.01
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • 6 inch Reduced Pressure Detector Backflow Preventer
  • Weight: 520.0 lb
  • Lead Free Ductile Iron Body with ArmorTek Coating
  • Protects against high hazard backpressure and backsiphonage
  • Flood Sensor with SentryPlus Alert Technology
  • Stainless Steel Relief Valve Seat and Check Components
  • Includes Domestic OSY Shutoff Valves
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F – 140°F

Description

The 6 inch FEBCO MasterSeries LF866 Lead Free Reduced Pressure Detector Backflow Preventer Assembly provides critical protection for potable water supplies against high hazard backpressure and backsiphonage. Featuring a durable ductile iron body with patented ArmorTek corrosion-resistant coating, it ensures extended service life. This assembly includes domestic OSY shutoff valves, stainless steel internal components, and a flood sensor with SentryPlus Alert technology for discharge detection. Ideal for industrial installations requiring robust fluid protection and leak monitoring. Maximum working pressure is 175 PSI.

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Connections & Compatibility

  • The 6 inch LF866-DOSY-LM-FS assembly is designed for installation in potable water supply lines to protect against high hazard cross-connections.
  • Its end connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards.
  • The integral flood sensor requires an add-on connection kit (sold separately) to enable communication for flood alerts via BMS, cellular, or integration with a BAS system (RS-485 Modbus) or the Nexa platform (Wi-Fi).
  • The bypass line includes a 5/8" x 3/4" check assembly compliant with AWWA C511 and a water meter compliant with AWWA C700.
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Additional Details

The 6 inch Lead Free FEBCO MasterSeries LF866 Reduced Pressure Detector Backflow Preventer Assembly is designed to protect potable water supplies from high hazard (toxic) fluids in industrial installations.

This assembly provides protection against both backpressure and backsiphonage conditions and includes a flood sensor for enhanced safety.

Features

  • Flood Sensor: Features a flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve, indicating potential flooding events. An add-on connection kit (sold separately) is required to activate the sensor for communication via BMS, cellular, or integration with BAS via RS-485 Modbus or the Nexa platform by Wi-Fi.
  • Corrosion Protection: Equipped with ArmorTek coating technology, a patented 3-part advanced epoxy system applied to internal and external ductile iron surfaces for integrated protection against electrochemical corrosion and microbial-induced corrosion (MIC).
  • Reliable Performance: Incorporates stainless steel relief valve seat and stainless steel check components for maximum performance, durability, and extended service life.
  • Detector Bypass Assembly: A compact bypass line is integrated to detect potential underground leaks, unauthorized water usage, or small discharges from the main valve.
  • Serviceable Design: Main valve assembly is inline serviceable with top entry covers for easy access to check modules without special tools.

Connections

  • Features domestic Outside Stem and Yoke (OSY) resilient wedge gate shutoff valves.
  • Includes four properly located resilient seated ball valve test cocks.

Note: An add-on connection kit is required to activate the flood sensor for communication functionality. The flood sensor is a passive component that does not communicate with any other device unless the kit is installed. Connection kits are sold separately.

Specifications

  • Product Type: Reduced Pressure Detector Backflow Preventer Assembly
  • Model: LF866 (Type II)
  • Nominal Size: 6 inch
  • Main Valve Body Material: Ductile Iron Grade 65-45-12
  • Relief Valve Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek Powder Coating
  • Shutoff Valves: OSY Resilient Wedge Gate Valve
  • Check Seats: Stainless Steel
  • Relief Valve Seat: Stainless Steel
  • Disc Holder: Stainless Steel
  • Elastomer Disc: Silicone
  • Spring Material: Stainless Steel

Pressure & Temperature

  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Minimum Working Pressure: 20 PSI (1.4 bar)
  • Hydrostatic Test Pressure: 350 PSI (24.1 bar)
  • Hydrostatic Safety Pressure: 700 PSI (48.3 bar)
  • Temperature Range: 33°F – 140°F (0.5°C – 60°C) continuous

Certificates & Approvals

  • FCCCHR-USC (Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California)
  • ASSE 1047
  • UL Classified (US & Canada)
  • FM Approved
  • IAPMO/CUPC
  • AWWA Standard C511 Compliant
  • AWWA Standard C700 Compliant (Bypass Water Meter)
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • OSY Shutoff Valves: ANSI/AWWA C515 Compliant, UL Classified, FM Approved

FAQs

What type of hazard does this backflow preventer protect against?

This backflow preventer is designed to protect potable water supplies against high hazard (toxic) fluids, preventing both backpressure and backsiphonage conditions.

What is ArmorTek coating and why is it important?

ArmorTek is a patented 3-part advanced epoxy coating system applied to the ductile iron body. It provides integrated protection against electrochemical corrosion and microbial-induced corrosion (MIC), extending the assembly's lifespan.

Does this assembly include a water meter?

No, this specific assembly, "LF866-DOSY-LM-FS", indicates "Less Meter" (LM). While the bypass line is designed for a meter, this model does not include one.

How does the flood sensor work?

The flood sensor with SentryPlus Alert technology detects continuous discharge from the relief valve. To enable communication for flood alerts (via BMS, cellular, or Wi-Fi to a BAS/Nexa platform), an add-on connection kit is required and sold separately.

What are the main components and materials of this backflow preventer?

It features a ductile iron body, domestic OSY resilient wedge gate shutoff valves, stainless steel relief valve seat, stainless steel check components, and silicone elastomer discs.

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