4 LF876-W-LG-GPM

Item Number: 88007331
1 1
$7,747.50
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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: 255.0 lb
  • Body Material: Ductile iron Grade 65-45-12
  • Coating: ArmorTek® advanced epoxy system
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Bypass Meter: Gallons per Minute (GPM)
  • Orientation: N-Pattern (horizontal)
  • Certifications: ASSE 1048, UL Classified, FM Approved

Description

The 4 inch MasterSeries® LF876W/WZ Double Check Detector Backflow Preventer Assembly is designed to prevent polluted water from entering potable water supplies due to backpressure or backsiphonage. This Lead Free assembly features a durable ductile iron body with ArmorTek® advanced epoxy coating for superior corrosion resistance. It offers a convenient drop-in replacement for competitor's N-pattern valves and includes a gallons per minute (GPM) metered bypass for leak detection and monitoring unauthorized water use. Certified by ASSE, UL, and FM, it ensures reliable protection for non-health hazard applications in accordance with local water utility codes.
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Additional Details

This 4 inch Lead Free MasterSeries® LF876W/WZ double check detector backflow preventer assembly is designed to prevent the reverse flow of polluted water from entering a potable water supply due to backsiphonage or backpressure conditions. It is suitable for non-health hazard (pollutant) applications in accordance with Local Governing Water Utility Code, and is ideal for fire protection systems where indications of system leakage or unauthorized water use are needed.

Features

  • Ductile iron body construction with patented ArmorTek® 3-part advanced epoxy coating system for corrosion resistance.
  • Designed for drop-in replacement of competitor's N-pattern valves.
  • Can be configured for N and Z-pattern (vertical up) orientations to reduce installation footprint.

Main Valve Features

  • In-line serviceable assembly requiring no special tools for maintenance.
  • Features captured modular spring assembly.
  • Reversible and replaceable discs.
  • Field replaceable seats.
  • ArmorTek coating technology resists 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 design, remaining within the main valve assembly profile.
  • In-line serviceable 3/4 inch check assembly.
  • Field replaceable seat and disc.
  • Designed to detect potential underground water leaks and unauthorized water usage.

Specifications

  • Product Type: Double Check Detector Backflow Preventer Assembly
  • SKU: 88007331
  • Series: MasterSeries® LF876W/WZ
  • Nominal Size: 4 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: Silicone
  • Spring: Stainless steel
  • Clamp: AWWA C606

Performance

  • 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

  • Lead Free* (Wetted surface contains less than 0.25% lead by weight)
  • Approved by 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/CUPC
  • AWWA Standard C510 Compliant
  • CSA B64.5
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

FAQs

What is the primary use of the LF876W/WZ Double Check Detector Assembly?

This assembly is primarily used on potable drinking water systems and fire sprinkler systems to prevent the reverse flow of non-health hazard (pollutant) quality water into the potable water supply due to backpressure or backsiphonage conditions.

What does 'Lead Free' mean for this product?

The 'Lead Free' designation indicates that the wetted surface of this product, which comes into contact with consumable water, contains less than 0.25% of lead by weight, meeting regulatory requirements for potable water applications.

What is the purpose of the ArmorTek® coating?

ArmorTek® is a patented three-part advanced epoxy system applied to the iron components of the backflow preventer. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal surfaces, extending the product's lifespan and maintaining performance.

Can this backflow preventer assembly replace other brands?

Yes, the MasterSeries LF876W/WZ is specifically designed to provide drop-in replacement functionality for competitor's valves with an N-pattern lay length. It can also be configured for Z-pattern (vertical up) installations.

What is the bypass line's function on this detector assembly?

The auxiliary bypass line contains a 5/8"x3/4" water meter and an approved check assembly. Its function is to detect potential underground water leaks within the system and to monitor for any unauthorized water usage.

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