6 LF860-DOSY-FS

Item Number: F683101
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$20,619.85
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 6 inch
  • Weight: 655.0 lb
  • Lead Free Construction: Yes
  • Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek® Epoxy Coating
  • Shutoff Valves: Domestic OSY Resilient Wedge Gate
  • Relief Valve Seat & Check Components: Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Flood Sensor with SentryPlus Alert® Technology

Description

The FEBCO MasterSeries LF860 is a 6-inch lead-free reduced pressure zone backflow preventer assembly designed to safeguard potable water systems from high-hazard contaminants. It features a durable ductile iron body with ArmorTek® epoxy coating for advanced corrosion resistance and includes domestic OSY shutoff valves. Stainless steel relief valve seat and check components ensure long-lasting performance. An integrated flood sensor with SentryPlus Alert® technology detects excessive relief valve discharge, providing early warnings when paired with an add-on connection kit. This assembly is suitable for industrial applications requiring robust backflow protection.

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Flood Sensor Activation

  • This LF860 assembly includes a flood sensor to detect excessive relief valve discharge.
  • To activate the flood sensor and enable alerts, an add-on connection kit is required.
  • Without a connection kit, the sensor remains a passive component and cannot communicate.
  • Connection kit options include integration with Building Management Systems (BMS), cellular communication, or the Sensor Control Monitor which connects via RS‑485 Modbus or the Nexa® platform through Wi-Fi.
  • A retrofit sensor connection kit is also available for existing installations.
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Additional Details

This 6 inch MasterSeries® LF860 Reduced Pressure Zone Backflow Preventer Assembly is designed to protect potable drinking water systems from high hazard (toxic) fluids due to backpressure and backsiphonage, typically in industrial installations and applications.

The assembly features a Lead Free construction, an ArmorTek® epoxy coating, and a flood sensor for enhanced safety and durability.

Key Features

  • Ductile iron valve body construction with patented 3-part ArmorTek® epoxy coating to resist microbial induced corrosion (MIC) and protect exposed metal substrate.
  • Equipped with domestic outside stem and yoke (OSY) resilient seated gate valves for secure shutoff.
  • Features stainless steel relief valve seat and stainless steel check components for maximum performance and extended durability.
  • Includes a flood sensor with SentryPlus Alert® technology to detect continuous water discharge from the relief valve, alerting personnel to potential flooding.
  • Inline serviceable assembly design allows for maintenance without special tools.
  • Incorporates modular and repairable pressure differential relief valve with captured modular spring and O-ring designs.
  • Check components are reversible and replaceable, and seats are field replaceable.

An add-on connection kit is required to activate the flood sensor. Without this kit, the flood sensor operates as a passive component and does not communicate with other devices. Watts® is not responsible for the failure of alerts due to connectivity issues, power outages, or improper installation.

Specifications

  • Size: 6 inch
  • Product Type: Reduced Pressure Zone Backflow Preventer Assembly
  • Series: LF860
  • Lead Free: Yes (contains less than 0.25% lead by weight)
  • Main Valve Body Material: Ductile iron Grade 65-45-12
  • Relief Valve Body Material: Ductile iron Grade 65-45-12
  • Coating: ArmorTek® powder coating (internal and external surfaces)
  • Shutoff Valves: Domestic OSY resilient wedge gate valve (AWWA C515, UL Classified, FM Approved)
  • 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

  • Approved by The Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCHR-USC)
  • ASSE 1013 Listed
  • UL Classified™ (US & Canada)
  • FM Approved
  • IAPMO
  • AWWA Standard C511 Compliant
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • Horizontal Flow Orientation: Approved by FCCHR-USC, ASSE, cULus, FM, IAPMO, and CSA B64.4

FAQs

What is the primary purpose of the FEBCO LF860 backflow preventer?

The primary purpose is to protect potable drinking water systems from contamination by high-hazard (toxic) fluids due to backpressure and backsiphonage conditions. It is typically used in industrial installations and applications.

Is this backflow preventer lead-free?

Yes, the MasterSeries LF860 features Lead Free construction, meaning the wetted surface contains less than 0.25% of lead by weight, complying with low lead installation requirements.

How does the flood sensor feature work?

The integrated flood sensor with SentryPlus Alert® technology detects continuous water discharges from the relief valve. When an add-on connection kit is installed, the sensor relays a signal to trigger multichannel alerts (call, email, text) to notify personnel of potential flooding.

What materials are used for the main components to ensure durability?

The main valve body and relief valve body are constructed from ductile iron Grade 65-45-12, coated with ArmorTek® advanced epoxy for corrosion resistance. Critical components like the relief valve seat and check components are made of stainless steel.

What is the maximum operating pressure for this 6-inch assembly?

The maximum working pressure for this 6-inch LF860 backflow preventer is 175 psi (12.1 bar). It has a hydrostatic test pressure of 350 psi.

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