3 LF866-DOSY-GPM-FS

Item Number: F683164
1 1
$13,917.29
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 3 inch
  • Weight: 245.0 lb
  • Lead Free construction
  • ArmorTek® coated ductile iron body
  • Stainless steel relief valve seat and check components
  • Integrated flood sensor with SentryPlus Alert® technology
  • GPM metered bypass for leak detection
  • Max. Working Pressure: 175 psi
  • Approvals: ASSE 1047, UL Classified, FM Approved

Description

The 3 inch FEBCO MasterSeries LF866 Lead Free Reduced Pressure Zone Detector Backflow Preventer Assembly is designed for high hazard/toxic applications in potable water systems. It features a durable ductile iron body with ArmorTek® anti-corrosion coating and stainless steel internal components for extended life. An integrated flood sensor with SentryPlus Alert® technology detects relief valve discharge, requiring an add-on connection kit for active alerts. The assembly includes a GPM metered bypass for leak detection and UL Classified/FM Approved OSY shutoff valves. It ensures compliance with governing water utility codes and offers a maximum working pressure of 175 psi. Item number F683164.

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Connection Information

  • This MasterSeries LF866V assembly is designed for installation on potable water supply lines at points of cross-connection.
  • It protects against backpressure and backsiphonage in high hazard/toxic fluid applications.
  • The assembly features flanged end connections that comply with ASME B16.1 Class 125 and AWWA Class D Flange standards.
  • The flood sensor requires an add-on connection kit (not included) to activate its alert capabilities for BMS, cellular communication, or smart device integration.
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Additional Details

This 3 inch Lead Free MasterSeries Reduced Pressure Zone Detector Backflow Preventer Assembly is designed to protect potable drinking water systems against backpressure and backsiphonage conditions for high hazard/toxic fluids in industrial installations and applications.

Design & Protection

  • Features a ductile iron body construction with patented ArmorTek® 3-part advanced epoxy coating system, engineered to reduce both microbial-induced corrosion (MIC) and exposed metal substrate corrosion.
  • Equipped with a stainless steel relief valve seat and stainless steel check components for maximum performance and durability.
  • Includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • The sensor can relay alerts for potential flooding events when paired with an add-on connection kit (BMS, cellular communication, or Sensor Control Monitor for integration with BAS via RS-485 Modbus or Nexa® platform through Wi-Fi).
  • Important: An add-on connection kit is required to activate the flood sensor. Without the connection kit, the flood sensor is a passive component and will not communicate with other devices. The flood sensor does not replace the need for proper drainage or compliance with installation regulations.

Bypass Assembly & Connections

  • Features a gallons per minute (GPM) metered bypass assembly to detect potential underground water leaks or unauthorized water usage.
  • Supplied with domestic outside stem and yoke (OSY) shutoff valves and ball valve test cocks.
  • Inline serviceable design allows for maintenance without special tools.
  • Check modules feature replaceable stainless steel seats and reversible, replaceable discs.

Specifications

Materials

  • Main Valve Body: Ductile iron Grade 65-45-12
  • Relief Valve Body: Ductile iron Grade 65-45-12
  • Coating: ArmorTek powder coating (internal and external surfaces)
  • Shutoff Valves: OSY resilient wedge gate valve AWWA C515
  • Check Seats: Stainless steel
  • Relief Valve Seat: Stainless steel
  • Disc Holder: Stainless steel
  • Elastomer Disc: Silicone
  • Spring: Stainless steel

Performance

  • Size: 3 inch
  • 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
  • Bypass Meter: 5/8" x 3/4" GPM Water Meter

Certificates & Approvals

  • Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • ASSE 1047
  • UL Classified (US & Canada)
  • FM Approved
  • IAPMO/CUPC
  • AWWA Standard C511 Compliant
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • NSF Certified: NSF/ANSI/CAN 61 & 372

FAQs

What is the primary purpose of the FEBCO MasterSeries LF866 backflow preventer?

Its primary purpose is to protect potable drinking water systems from contamination due to backpressure and backsiphonage conditions, especially in high hazard or toxic fluid applications.

Is an additional kit required for the flood sensor to function?

Yes, an add-on connection kit is required to activate the flood sensor's alert capabilities. Without this kit, the sensor is a passive component and will not communicate or send alerts.

What is ArmorTek® coating, and what does it do?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the ductile iron body. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates from corrosion.

What is the maximum operating pressure for this assembly?

The maximum working pressure for this 3-inch assembly is 175 psi (12.1 bar).

What does the GPM metered bypass assembly detect?

The gallons per minute (GPM) metered bypass assembly is designed to detect potential underground water leaks or unauthorized water usage within the system.