6 LF856-LG-GPM

Item Number: 0124429
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$10,482.75
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 6 inch
  • Weight: 189.0 lb
  • Lead Free Construction: Less than 0.25% lead by weight
  • Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek® Fusion Epoxy for corrosion resistance
  • Maximum Working Pressure: 175 psi
  • Auxiliary Bypass: Includes GPM water meter
  • Check Components: Stainless steel, field replaceable
  • Serviceability: In-line without special tools

Description

This 6 inch FEBCO MasterSeries® LF856 Lead Free Double Check Detector Backflow Preventer Assembly is engineered to protect drinking water supplies from non-health hazard pollutants. Featuring a durable ductile iron body with ArmorTek® fusion epoxy coating, it resists microbial-induced and electrochemical corrosion. The assembly includes two in-line independent check valves, replaceable stainless steel seats, and a GPM metered bypass for detecting leaks or unauthorized water usage. It is suitable for fire sprinkler and standpipe systems, and is rated for a maximum working pressure of 175 psi. Item number 0124429.

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Connections and Applications

  • This assembly is designed for installation on the potable water supply at each point of cross-connection.
  • Primary use for fire sprinkler and standpipe systems where detection of unauthorized water use is required.
  • Protects against backpressure and backsiphonage conditions for non-health hazard (pollutant) applications.
  • The assembly is supplied without shutoff valves and utilizes end connections compliant to ASME B16.1 Class 125 & AWWA Class D Flange.
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Additional Details

This 6 inch lead free MasterSeries® double check detector backflow preventer assembly protects potable water supplies from dangerous cross-connections by preventing the backflow of objectionable, non-toxic pollutants due to backsiphonage or backpressure. It is primarily used for fire sprinkler and standpipe systems requiring detection of unauthorized water use, and for non-health hazard applications.

Main Valve Features

  • In-line serviceable assembly without requiring special tools
  • Captured modular spring assembly for easy maintenance
  • Reversible and replaceable discs
  • Field replaceable seats
  • Robust ductile iron valve body design (Grade 65-45-12)
  • Stainless steel check components with clapper check assembly
  • ArmorTek® coating technology resists microbial-induced corrosion (MIC) and electrochemical corrosion
  • Winterization feature with disc retainers and valve body drain ports
  • Commonality between 1st and 2nd check components
  • Captured O-ring design

Auxiliary Bypass Features

  • Compact bypass design remains within main valve assembly profile
  • In-line serviceable ¾ inch check assembly without requiring special tools
  • Field replaceable seat and disc
  • Detects potential underground water leaks
  • Detects unauthorized water usage
  • Equipped with a Gallons Per Minute (GPM) water meter

NOTICE: The information provided is not intended to replace full product installation and safety information. Always read all installation instructions and product safety information before installing. Inquire with governing authorities for local installation requirements.

Specifications

  • Size: 6 inch
  • Body Material: Ductile iron Grade 65-45-12
  • Coating: ArmorTek® powder coating (internal and external surfaces)
  • Check Seats: Stainless steel
  • Disc Holder: Stainless steel
  • Elastomer Disc Material: Silicone
  • Spring Material: Stainless steel
  • Bypass Meter: 5/8" x 3/4" Water Meter (ANSI/AWWA C700 Compliant), Gallons Per Minute (GPM)
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Minimum Working Pressure: 10 psi (0.7 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
  • Lead Content: Less than 0.25% by weight (wetted surface)

Dimensions (Nominal)

  • Overall Length (A): 56 inches (1422 mm)
  • Width (B): 34 3/4 inches (883 mm)
  • Height (E**): 30 1/8 inches (765 mm)

Certificates & Approvals

  • Approved by: FCCCHR-USC
  • Listed: ASSE 1048
  • Classified: UL Classified (U.S. & Canada)
  • Approved: FM Approved
  • Approved: IAPMO
  • Compliant to: AWWA Standard C510
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

FAQs

What does "Lead Free" mean for this backflow preventer?

“Lead Free” means that the wetted surface of this product, which comes into contact with consumable water, contains less than 0.25% of lead by weight, complying with current regulations.

What is the primary application for this 6 inch LF856 backflow assembly?

This assembly is primarily used to protect potable water supplies from non-health hazard pollutants in applications such as fire sprinkler and standpipe systems, where detection of unauthorized water usage is required. It guards against both backpressure and backsiphonage.

Does this backflow preventer come with shutoff valves?

No, this specific 6 inch LF856-LG-GPM model is supplied “Less Gate Valves,” meaning shutoff valves are not included and must be purchased separately if needed for your installation.

What is ArmorTek® coating technology and what are its benefits?

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

How does the auxiliary bypass assembly contribute to the system?

The auxiliary bypass includes a 5/8" x 3/4" water meter (GPM meter) that monitors for potential underground water leaks or unauthorized water usage within the system. It also provides additional backflow protection.

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