4 LF870-W-DOSY

Item Number: 88005407
1 1
$9,271.50
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Valve Size: 4 Inch
  • Weight: 435.0 lb
  • Lead Free Construction: Less than 0.25% lead by weight
  • Ductile Iron Body: Grade 65-45-12
  • ArmorTek Coating: Resists MIC and corrosion
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F continuous
  • Drop-in Replacement: Longer gate-to-gate length
  • In-Line Serviceable: No special tools required

Description

The FEBCO MasterSeries LF870W is a 4 inch lead-free double check valve backflow preventer assembly, designed to prevent polluted water from entering potable water supplies due to backsiphonage or backpressure. Its N-pattern orientation and longer gate-to-gate length allow for direct drop-in replacement of competitor valves. Featuring a durable ductile iron body with ArmorTek® anti-corrosion coating and OSY resilient seated gate valves, this assembly ensures reliable performance. It is in-line serviceable without special tools and is approved by ASSE, UL, FM, IAPMO, AWWA, FCCCHR-USC, and NSF for non-health hazard applications.

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Installation Orientation

  • This N-pattern (LF870W) assembly is designed for horizontal installations.
  • Standard installation involves inlet flow vertically up and outlet flow vertically down.
  • It is designed for drop-in replacement of existing N-pattern competitor valves due to its longer gate-to-gate length.

Connection Compatibility

  • End connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards, ensuring broad compatibility with corresponding piping systems.
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Additional Details

This 4 inch FEBCO MasterSeries LF870W Double Check Valve Assembly is designed to prevent the backflow of polluted water into the potable water supply due to backsiphonage and/or backpressure, in accordance with national plumbing codes and water authority requirements. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as non-health hazards.

Design & Construction

  • Features a longer gate-to-gate length for direct drop-in replacement of existing N-pattern competitor valves.
  • Constructed with a fused epoxy ductile iron body.
  • Equipped with domestic OSY resilient seated gate valves.
  • Includes two in-line independent positive seating check modules with captured springs and replaceable check discs and seats.
  • Features top mounted test cocks.
  • The valve body and iron components are coated with ArmorTek®, a patented 3-part advanced epoxy system, to resist microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • Designed for in-line servicing without special tools.
  • Lead Free* construction complies with low lead installation requirements.

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Specifications

General

  • Product Type: Double Check Valve Assembly
  • Valve Size: 4 Inch
  • SKU: 88005407
  • Brand: FEBCO
  • Model: LF870W
  • Orientation: N-Pattern (Horizontal)
  • Lead Content: Less than 0.25% by weight (Lead Free)

Materials

  • Main Valve Body: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek Powder Coating (Internal & External)
  • Shutoff Valves: OSY Resilient Wedge Gate Valve (AWWA C515)
  • 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

Connections

  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

Certificates & Approvals

  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research (FCCCHR-USC)
  • ASSE 1015 Listed
  • UL Classified (U.S. & Canada)
  • FM Approved
  • IAPMO
  • AWWA Standard C510 Compliant
  • NSF Certified to NSF/ANSI 61-G

FAQs

What is the primary purpose of the FEBCO MasterSeries LF870W double check valve assembly?

Its primary purpose is to prevent the backflow of polluted water into a potable water supply system, protecting against backsiphonage and backpressure conditions in non-health hazard applications.

Can this valve assembly replace an existing backflow preventer from another brand?

Yes, it is specifically designed with a longer gate-to-gate length to provide a direct drop-in replacement for competitor N-pattern valves of the same size.

What is ArmorTek® coating and why is it used?

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

What are the typical installation orientations for the LF870W model?

The LF870W (N-pattern) model is designed for horizontal installations, with standard inlet flow vertical up and outlet flow vertical down.

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

The maximum working pressure for this assembly is 175 PSI (12.1 bar), and it can continuously operate in a temperature range of 33°F to 140°F (0.5°C to 60°C).

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