8 LF866-LG-GPM-FS

Item Number: F683154
1 1
$26,799.00
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 8 inch
  • Weight: 350.0 lb
  • Lead Free Construction
  • Ductile Iron Body with ArmorTek® Coating
  • Stainless Steel Relief Valve Seat and Check Components
  • Flood Sensor with SentryPlus Alert® Technology (requires add-on kit for activation)
  • Gallons Per Minute (GPM) Metered Bypass
  • Max Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F

Description

This 8 inch FEBCO MasterSeries LF866 Reduced Pressure Detector Backflow Preventer Assembly is designed for high hazard/toxic applications, protecting potable water systems from backpressure and backsiphonage. Featuring a durable ductile iron body with patented ArmorTek® epoxy coating, it offers superior corrosion resistance and extended life. It includes a flood sensor with SentryPlus Alert® technology to detect relief valve discharge, requiring an add-on connection kit for activation. The assembly is supplied without shutoff valves, containing replaceable stainless steel check seats, a stainless-steel relief valve seat, and a GPM metered bypass for leak detection. Item number F683154.

Help Me Connect

Flood Sensor Connection

  • This backflow preventer includes an integrated flood sensor with SentryPlus Alert® technology designed to detect excessive water discharges from the relief valve.
  • To enable the flood sensor to communicate and provide alerts, an add-on connection kit is required.
  • Available connection kit options support integration with Building Automation Systems (BMS), cellular networks, or the Nexa® platform via Wi-Fi, as well as RS-485 Modbus.

Bypass Meter

  • The assembly features a gallons per minute (GPM) metered bypass which helps in detecting potential underground water leaks and unauthorized water usage within your water system.

Assembly Configuration Note

  • This specific product (8 LF866-LG-GPM-FS) is supplied without shutoff valves. To ensure a complete and approved installation that meets regulatory requirements, you will need to procure and install appropriate UL Classified and FM Approved OS&Y resilient wedge gate valves separately.
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Additional Details

This 8 inch lead free MasterSeries® reduced pressure detector backflow preventer assembly protects against high hazard (toxic) fluids in water services for industrial installations and applications. This specific assembly is supplied without shutoff valves and includes a gallons per minute (GPM) metered bypass.

It features a ductile iron body coated with patented 3-part ArmorTek® epoxy coating engineered to limit microbial-induced corrosion (MIC) and protect exposed metal substrates, ensuring enhanced durability and extended valve life. The design incorporates replaceable stainless steel check seats and a stainless-steel relief valve seat for maximum performance and reliability.

Flood Sensor Technology

  • This assembly includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • To activate the flood sensor and relay alerts for potential flooding events, an add-on connection kit is required.
  • Connection kit options include BMS, cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

Bypass Assembly

  • Equipped with a gallons per minute (GPM) metered bypass to detect potential underground water leaks and unauthorized water usage.
  • The bypass line includes ball valve test cocks.

This assembly is supplied without shutoff valves, and therefore is NOT an approved assembly on its own. It requires the addition of approved shutoff valves to meet regulatory requirements.

Specifications

  • Size: 8 inch
  • Product Type: Reduced Pressure Zone Detector Backflow Preventer Assembly
  • Configuration: Less Shutoff Valves (LG), Gallons Per Minute (GPM) Metered Bypass, Flood Sensor (FS)
  • Main Valve Body Material: Ductile Iron Grade 65-45-12
  • Relief Valve Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek powder coating (applied to internal and external surfaces)
  • Check Seats Material: Stainless steel
  • Relief Valve Seat Material: Stainless steel
  • Disc Holder Material: Stainless steel
  • Elastomer Disc Material: Silicone
  • Spring Material: Stainless steel
  • 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

  • Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • ASSE 1047
  • UL Classified** (US & Canada)
    (**Note: This assembly as configured without shutoff valves is not UL Classified or FM Approved.)
  • FM Approved**
    (**Note: This assembly as configured without shutoff valves is not UL Classified or FM Approved.)
  • IAPMO/CUPC
  • AWWA Standard C511 Compliant
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

Dimensions (Nominal)

  • Length (A): 65 inches (1651 mm)
  • Height (G): 11 1/8 inches (283 mm)

FAQs

What does "LG" mean in the product name 8 LF866-LG-GPM-FS?

"LG" indicates that this specific assembly is supplied Less Shutoff Valves. According to the manufacturer, this configuration is NOT an APPROVED ASSEMBLY on its own and requires additional approved shutoff valves to meet regulatory standards.

How does the flood sensor function, and what is required to activate it?

The integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. To activate this sensor and receive alerts for potential flooding, an add-on connection kit is required, which can enable BMS, cellular, or Wi-Fi communication.

What type of applications is this backflow preventer suitable for?

This 8 inch FEBCO MasterSeries LF866 backflow preventer is designed for high hazard/toxic applications in potable drinking water systems. It protects against both backpressure and backsiphonage conditions.

What is the purpose of the ArmorTek® coating on this assembly?

The ArmorTek® coating is a patented three-part advanced epoxy system applied to the ductile iron body. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the assembly's durability and extending its service life.

What are the maximum operating pressure and temperature limits for this device?

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