4 LF876V-DOSY-GPM

Item Number: 0124478
1 1
$12,384.67
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 4 inch
  • Weight: 450.0 lb
  • Lead-Free Construction (less than 0.25% lead by weight)
  • Main Valve Body: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek® Advanced Epoxy System
  • Max. Working Pressure: 175 psi
  • Temperature Range: 33°F to 140°F
  • Configurable for Horizontal (N-Pattern) or Vertical-Up (Z-Pattern) installation
  • Bypass Assembly: 5/8"x3/4" GPM Water Meter

Description

The 4 inch FEBCO MasterSeries LF876V Double Check Detector Assembly is a lead-free backflow preventer designed for non-health hazard potable water and fire sprinkler systems. It prevents backflow from backsiphonage and backpressure, providing indication of system leakage or unauthorized water use via its GPM metered bypass. Featuring a durable ductile iron body with ArmorTek® advanced epoxy coating for corrosion resistance, this assembly offers versatile N-Pattern (horizontal) or Z-Pattern (vertical) installation. It operates up to 175 psi in temperatures from 33°F to 140°F. Item number 0124478.

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Installation Orientation

  • This assembly is configurable for Horizontal (N-Pattern) and Vertical-Up (Z-Pattern) installations. The MasterSeries LF876V is shipped in the standard (N-pattern) orientation.

Connections

  • The assembly shall be installed on the potable water supply and at each point of cross-connection.
  • It is fitted with approved UL Classified/FM Approved inlet/outlet resilient seated shutoff valves.
  • End connections are compliant to ASME B16.1 Class 125 and AWWA Class D Flange standards.
  • The auxiliary bypass line contains a 5/8"x3/4" Water Meter compliant with ANSI/AWWA Standard C700.
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Additional Details

The 4 inch MasterSeries LF876V Double Check Detector Assembly is specifically designed to prevent the reverse flow of polluted water from entering into the potable supply due to backsiphonage or backpressure. It is primarily used on potable drinking water systems and fire sprinkler systems where local codes mandate protection from non-potable quality water being pumped or siphoned back into the potable water system.

The unit's lead-free construction means the wetted surface contacting consumable water contains less than 0.25% lead by weight.

Design and Construction

  • Features an epoxy coated ductile iron body with a patented ArmorTek® 3-part advanced epoxy coating system to limit both microbial induced (MIC) and exposed metal substrate corrosion.
  • Configurable design for both Horizontal (N-Pattern) and Vertical-Up (Z-Pattern) installations to reduce installation footprint and costs.
  • Consists of two in-line independent check valves with reversible and replaceable discs and field replaceable seats.
  • Includes ball valve test cocks and a gallons per minute (GPM) metered bypass to detect potential underground water leaks or unauthorized water usage.
  • Equipped with Outside Stem and Yoke (OSY) resilient seated domestic gate valves.
  • In-line serviceable assembly requires no special tools for servicing.

Before beginning installation, thoroughly read all installation instructions and product safety information. Inquire with governing authorities for local installation requirements.

Specifications

General

  • Product Type: Double Check Detector Assembly (Type II)
  • Size: 4 inch
  • Model: LF876V
  • Lead Free: Yes (less than 0.25% lead by weight)
  • Assembly Flow Orientation: Configurable N-Pattern (Horizontal) or Z-Pattern (Vertical Up)

Materials

  • Main Valve Body: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek® powder coating (internal and external)
  • Shutoff Valves: OSY resilient wedge gate valve (AWWA C515, UL/FM)
  • Check Seats: Stainless steel
  • Disc Holder: Stainless steel
  • Elastomer Disc: Silicone
  • Spring: Stainless steel
  • Clamp: AWWA C606
  • Bypass Water Meter: 5/8"x3/4" (ANSI/AWWA Standard C700)

Performance

  • Max. Working Pressure: 175 psi (12.1 bar)
  • Min. 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: Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • Listed: ASSE 1048
  • Classified: UL (U.S. & Canada)
  • Approved: FM, IAPMO/CUPC
  • Compliant to: AWWA Standard C510
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • Standard: CSA B64.5

FAQs

What is the primary application of the FEBCO MasterSeries LF876V?

This backflow preventer is primarily used on potable drinking water systems and fire sprinkler systems to protect against backsiphonage and backpressure of non-potable water.

Is this 4 inch backflow preventer lead-free?

Yes, the wetted surface of this product that contacts consumable water contains less than 0.25% of lead by weight, making it compliant with lead-free standards.

Can this backflow assembly be installed in different orientations?

Yes, the MasterSeries LF876V features a configurable design that allows for both Horizontal (N-Pattern) and Vertical-Up (Z-Pattern) installations to accommodate various site requirements.

What type of corrosion protection does this unit have?

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.

What is the purpose of the bypass assembly and GPM meter?

The auxiliary bypass line contains a 5/8"x3/4" Water Meter that complies with ANSI/AWWA Standard C700. It is designed to detect leaks or unauthorized water usage within the water system.

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