4 LF870-W-DNRS

Item Number: 88005408
1 1
$8,694.75
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 4 inch
  • Weight: 425.0 lb
  • Lead Free Construction
  • Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek advanced epoxy system
  • Max. Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F (0.5°C ~ 60°C)
  • In-line serviceable assembly
  • Designed for drop-in replacement of competitor N-pattern valves

Description

The FEBCO MasterSeries LF870W Double Check Valve Assembly is a 4 inch lead-free backflow preventer designed to protect potable water systems from non-health hazard pollution due to backsiphonage and backpressure. It features a durable ductile iron body with ArmorTek® coating for corrosion resistance and stainless steel check components. This assembly is engineered for drop-in replacement of competitor N-pattern valves, offering in-line serviceability without special tools. Approved by FCCCHR-USC, ASSE 1015, UL, FM, IAPMO, AWWA C510, and NSF/ANSI 61-G, it is suitable for continuous pressure piping applications with a maximum working pressure of 175 psi and a temperature range of 33°F to 140°F. Item number 88005408.

Help Me Connect

Connections and Compatibility

  • This FEBCO MasterSeries LF870W Double Check valve assembly is specifically designed to provide drop-in replacement for a competitor's valves in the N-pattern (LF870W) orientation.
  • The assembly is installed on the potable water supply and at each point of cross-connection to protect against possible backpressure and backsiphonage conditions for non-health hazard (pollutant) applications.
  • The assembly features AWWA Compliant inlet/outlet resilient seated shutoff valves and complies with ASME B16.1 Class 125 & AWWA Class D Flange end connections.
View full details

Additional Details

This 4 inch lead free MasterSeries® double check valve backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and/or backpressure in accordance with national plumbing codes and water authority requirements.

Its compact modular design facilitates easy maintenance for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as non-health hazards. This assembly is specifically designed to provide drop-in replacement of competitor's valves in the N-pattern orientation.

Features

  • Longer gate-to-gate length for drop-in replacement of longer valves
  • In-line serviceable assembly for easy maintenance
  • Supports vertical up/vertical down N-pattern installations
  • No special tools required 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
  • Commonality between 1st and 2nd check components
  • Captured O-ring design

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

Specifications

  • Size: 4 inch
  • Product Type: Double Check Valve Assembly
  • Pattern: N-Pattern
  • Construction: Lead Free
  • Main Valve Body Material: Ductile iron Grade 65-45-12
  • Coating: ArmorTek powder coating (applied to internal and external surfaces)
  • Shutoff Valves: Domestic NRS resilient wedge gate valve AWWA C509 (Standard)
  • Check Seats Material: Stainless steel
  • Disc Holder Material: Stainless steel
  • Elastomer Disc Material: Silicone
  • Spring Material: Stainless steel
  • Clamp Material: AWWA C606

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

End Connections

  • Connection Type: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

Certificates & Approvals

  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (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 use of this backflow preventer?

This 4 inch FEBCO LF870W/WZ Double Check Valve Assembly is primarily used on potable drinking water systems to protect against possible backpressure and backsiphonage conditions for non-health hazard (pollutant) applications, as mandated by Local Governing Water Utility Code.

What does 'Lead Free' mean for this product?

The 'Lead Free' construction indicates that the wetted surface of this product, when contacted by consumable water, contains less than 0.25% of lead by weight. This complies with low lead installation requirements and state codes.

What is ArmorTek® coating technology?

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 substrates, enhancing the durability and lifespan of the assembly.

Can this backflow preventer be installed in both horizontal and vertical positions?

Yes, this assembly is approved for horizontal (N-pattern) and vertical-up (Z-pattern) installations, meeting the requirements of AWWA Standard C510 flow and pressure loss performance.

What is the maximum operating pressure for this assembly?

The maximum working pressure for the 4 inch LF870W Double Check Valve Assembly is 175 psi (12.1 bar).

Related Products