4 LF866-LG-CFM-FS

Item Number: F683158
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$9,627.75
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Product Type: 4 inch Reduced Pressure Zone Detector Assembly
  • Weight: 154.0 lb
  • Lead Free: Compliant with low lead requirements
  • Body Material: Ductile iron with ArmorTek® coating
  • Internal Components: Stainless steel relief valve seat and checks
  • Bypass Meter: 5/8" x 3/4" Totalizing cubic ft/min (CFM)
  • Flood Detection: SentryPlus Alert® sensor included
  • Maximum Working Pressure: 175 psi
  • Configuration: Less shutoff valves (not UL/FM approved)

Description

The FEBCO MasterSeries LF866 is a 4 inch lead-free Reduced Pressure Zone Detector Assembly designed to protect potable drinking water systems from high hazard cross-contamination caused by backpressure or backsiphonage. This robust unit features a durable ductile iron body with ArmorTek® corrosion-resistant coating and stainless steel internal components for extended service life. It includes a 5/8" x 3/4" CFM bypass water meter for leak detection and a SentryPlus Alert® flood sensor to monitor relief valve discharges. Note that this specific configuration is supplied without shutoff valves, affecting UL and FM approvals. Item number F683158.

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Installation & Integration

  • This 4 inch backflow preventer is designed for horizontal installation in potable water supply lines to protect against high hazard contaminants in industrial installations and applications.
  • The main line connections are compliant to ASME B16.1 Class 125 and AWWA Class D Flange standards.
  • The integrated flood sensor requires an add-on connection kit (sold separately) to activate its alert capabilities. Without this kit, the sensor operates passively without external communication.
  • Connection kit options allow integration with various systems including Building Management Systems (BMS), cellular communication networks, or a Sensor Control Monitor for integration with Building Automation Systems (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi.
  • The detector bypass assembly includes a 5/8" x 3/4" water meter for accurate flow measurement.
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Additional Details

This 4 inch lead free FEBCO MasterSeries® LF866 Reduced Pressure Zone Detector Assembly is designed to protect potable drinking water systems from high hazard (toxic) fluids caused by backpressure and backsiphonage conditions.

This assembly is ideal for industrial installations and applications where local governing codes mandate protection from non-potable quality water.

Key Features

  • Features a ductile iron body coated with ArmorTek®, a patented three-part advanced epoxy system engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates.
  • Equipped with stainless steel relief valve seat and stainless steel check components for maximum performance and durability, ensuring extended valve life.
  • Includes a detector bypass assembly with a 5/8" x 3/4" water meter for monitoring cubic feet per minute (CFM) flow, helping detect potential underground leaks or unauthorized water usage.
  • Integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve.
  • Designed with inline serviceable assemblies, allowing maintenance without special tools.

Important Note: An add-on connection kit is required to activate the flood sensor's alert capabilities. Without this kit, the sensor is passive and will not communicate with other devices. This assembly is supplied without shutoff valves, and as such, is NOT an APPROVED ASSEMBLY per specific certifications. Please consult all local codes and regulations regarding installation and approved configurations. Watts® is not responsible for alert failures due to connectivity issues, power outages, or improper installation.

Specifications

  • Product Type: Reduced Pressure Zone Detector Assembly (Type II)
  • Nominal Size: 4 inch
  • SKU: F683158
  • Bypass Meter: 5/8" x 3/4" Water Meter (Totalizing cubic ft/min)
  • Flood Sensor: Included (SentryPlus Alert® technology)
  • Shutoff Valves: Less (Not included)
  • Flow Orientation: Horizontal
  • Lead Content: Lead Free (less than 0.25% lead by weight)

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)
  • Check Seats: Stainless steel
  • Relief Valve Seat: Stainless steel
  • Disc Holder: Stainless steel
  • Elastomer Disc: Silicone
  • Spring Material: Stainless steel

Pressure and Temperature Ratings

  • 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)

Certificates & Approvals

  • Approved By: Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • Certified By: ASSE 1047
  • Certified By: IAPMO/CUPC
  • Compliant To: AWWA Standard C511
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • Certified To: NSF/ANSI/CAN 61 & 372 (Lead Free)
  • Note: This assembly is configured without shutoff valves and is therefore NOT UL Classified or FM Approved.

FAQs

What is the primary purpose of the FEBCO MasterSeries LF866 assembly?

The primary purpose of this 4 inch Reduced Pressure Zone Detector Assembly is to protect potable drinking water systems from contamination caused by backpressure and backsiphonage conditions, particularly in high hazard or toxic applications such as industrial installations.

Is this backflow preventer a lead-free product?

Yes, this FEBCO MasterSeries LF866 assembly features lead-free construction. The wetted surfaces that come into contact with consumable water contain less than 0.25% lead by weight, ensuring compliance with low lead installation requirements.

How does the ArmorTek® coating enhance this backflow preventer's performance?

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

What is the function of the integrated flood sensor?

The integrated flood sensor, featuring SentryPlus Alert® technology, is designed to detect excessive water discharges from the relief valve. When an add-on connection kit (sold separately) is used, the sensor can relay alerts for potential flooding events.

Are shutoff valves included with this specific LF866 model?

No, this specific FEBCO LF866 model (F683158) is supplied without shutoff valves. It is important to note that an assembly configured 'less shutoff valves' is NOT UL Classified or FM Approved.

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