2 1/2 LF856-OSY-GPM

Item Number: 0124432
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$9,079.60
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Lead Free Construction (less than 0.25% lead by weight)
  • Weight: 202.0 lb
  • Ductile Iron Body with ArmorTek Powder Coating
  • OS&Y Gate Valves (UL Classified/FM Approved)
  • GPM Metered Detector Bypass for leak detection
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F Continuous
  • In-line Serviceable Assembly
  • ASSE 1048, UL, and FM Approved

Description

The 2 1/2 inch MasterSeries® LF856 Lead Free Double Check Detector Backflow Preventer Assembly is designed to protect potable water supplies from non-health hazard pollutants. This assembly is ideal for cross-connections in irrigation, industrial processing, fire lines, and especially fire sprinkler and standpipe systems that require detection of unauthorized water usage. It features a durable ductile iron body with ArmorTek® epoxy coating for corrosion resistance, UL Classified/FM Approved OS&Y resilient seated gate valves, and a GPM metered bypass line. Rated for a maximum working pressure of 175 psi and continuous operation from 33°F to 140°F. Item number 0124432.

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Connections and Application

  • This assembly is designed for installation on the potable water supply at points of cross-connection to protect against possible backpressure and backsiphonage conditions.
  • It is primarily used for non-health hazard applications, such as irrigation, industrial processing, and specifically on fire sprinkler and standpipe systems.
  • End connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards.
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Additional Details

This 2 1/2 inch lead free MasterSeries® double check detector backflow preventer assembly prevents the backflow of pollutants, due to backsiphonage and/or backpressure, that are objectionable but not toxic, from entering into the potable water supply. It is ideal for protection of non-health hazard cross-connections or for containment at the service line entrance, primarily on fire sprinkler and standpipe systems requiring detection of unauthorized water use.

The iron components of this backflow preventer are coated with ArmorTek®, a patented three-part advanced epoxy system engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrate. This assembly is designed for in-line servicing without special tools.

Main Valve Features

  • In-line serviceable assembly requiring no special tools for servicing
  • Captured modular spring assembly
  • Reversible and replaceable discs
  • Field replaceable seats
  • Ductile iron valve body design
  • Stainless steel check components
  • ArmorTek coating technology to resist corrosion of internals
  • Winterization feature with disc retainers and valve body drain ports
  • Clapper check assembly with commonality between 1st and 2nd check components
  • Captured O-ring design

Auxiliary Bypass Features

  • Compact bypass design, remaining within the main valve assembly profile
  • In-line serviceable 3/4 inch check assembly requiring no special tools for servicing
  • Field replaceable seat and disc
  • Designed to detect potential underground water leaks
  • Designed to detect unauthorized water usage

Specifications

  • Product Type: Double Check Detector Backflow Preventer Assembly
  • SKU: 0124432
  • Nominal Size: 2 1/2 inch
  • Lead Content: Wetted surface contains less than 0.25% of lead by weight
  • Main Valve Body Material: Ductile iron Grade 65-45-12
  • Coating: ArmorTek powder coating (internal and external surfaces)
  • Shutoff Valves: OS&Y resilient wedge gate valves AWWA C515 (UL Classified/FM Approved)
  • Check Seats Material: Stainless steel
  • Disc Holder Material: Stainless steel
  • Elastomer Disc Material: Silicone
  • Spring Material: Stainless steel
  • Water Meter: 5/8 inch x 3/4 inch Water Meter (ANSI/AWWA C700 Compliant), GPM metered

Pressure & Temperature

  • 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

Certificates & Approvals

  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • ASSE 1048 Listed
  • UL Classified (U.S. & Canada)
  • FM Approved
  • IAPMO
  • AWWA Standard C510 Compliant
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

FAQs

What is the primary application of this backflow preventer?

This backflow preventer is designed for non-health hazard applications to protect potable water supplies from pollutants due to backsiphonage or backpressure. It is commonly used on fire sprinkler and standpipe systems where detection of unauthorized water use is required.

Is this product considered lead-free?

Yes, this MasterSeries® LF856 assembly is lead-free. The wetted surface of the product that comes into contact with consumable water contains less than 0.25% of lead by weight, meeting current lead-free standards.

What is ArmorTek® coating and what are its benefits?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the iron components of the backflow preventer. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the durability and lifespan of the assembly.

What is the maximum operating pressure and temperature range for this device?

The maximum working pressure for this 2 1/2 inch backflow preventer is 175 psi (12.1 bar). It has a continuous operating temperature range of 33°F to 140°F (0.5°C to 60°C).

How does the detector bypass assembly function?

The auxiliary bypass line includes a 5/8" x 3/4" water meter (ANSI/AWWA C700 Compliant) and is designed to detect small leaks or unauthorized water usage within the system. This feature helps identify potential water loss that might otherwise go unnoticed.

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