4 LF870-WZ-DOSY

Item Number: 88007319
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 Type: Double Check Valve Assembly
  • Weight: 435.0 lb
  • Size: 4 inch
  • Lay Length (Z-pattern): 32 13/16 inches
  • Max. Working Pressure: 175 psi
  • Body Material: ArmorTek Epoxy Coated Ductile Iron
  • Shutoff Valves: Domestic OSY Resilient Seated Gate
  • Lead Free: Yes, less than 0.25% lead by weight
  • Certifications: ASSE 1015, UL Classified, FM Approved, NSF 61-G

Description

The FEBCO MasterSeries LF870W/WZ 4 inch Lead Free Double Check Valve Assembly is designed for Z-pattern drop-in replacement applications in potable water systems. It protects against backpressure and backsiphonage in non-health hazard (pollutant) scenarios. Featuring an ArmorTek epoxy-coated ductile iron body and domestic OSY resilient seated gate valves, this assembly offers enhanced corrosion resistance and easy in-line serviceability. It is UL Classified, FM Approved, ASSE 1015 Listed, and NSF 61-G Certified, ensuring compliance with plumbing codes and water authority requirements. Item number 88007319.

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Connection and Compatibility

This 4 inch Double Check Valve Assembly is specifically engineered for Z-pattern installations and provides a direct drop-in replacement for existing competitor valves. It is approved for both horizontal and vertical-up installations. The assembly must be installed on the potable water supply line at any cross-connection point requiring protection against non-health hazard (pollutant) backflow. It is fitted with AWWA Compliant inlet/outlet resilient seated shutoff valves and end connections compliant to ASME B16.1 Class 125 and AWWA Class D Flange standards.

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Additional Details

This 4 inch Lead Free MasterSeries® LF870W/WZ Double Check Valve Assembly is designed to prevent the backflow of polluted water into the potable water supply due to backsiphonage and/or backpressure conditions. It provides a drop-in replacement solution for competitor's valves in a Z-pattern orientation, primarily used on potable drinking water systems for non-health hazard (pollutant) applications.

Features and Benefits

  • Longer gate-to-gate length for drop-in replacement of existing valves, specifically engineered for competitor's Z-pattern lay lengths.
  • In-line serviceable assembly requires no special tools for servicing check modules, allowing easy maintenance through independent top entry covers.
  • Approved for vertical up/vertical down N-pattern and vertical up Z-pattern installations.
  • Features ArmorTek® coating technology, a patented three-part advanced epoxy system applied to internal and external ductile iron surfaces to resist microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • Equipped with reversible and replaceable discs, field replaceable seats, and a captured modular spring assembly.
  • Includes domestic OSY resilient seated gate valves.
  • Lead Free* construction ensures the wetted surface contains less than 0.25% lead by weight, complying with low lead installation requirements.
  • Designed with a winterization feature including disc retainers and valve body drain ports.

Specifications

General

  • Product Type: Double Check Valve Assembly
  • Valve Size: 4 inch
  • Orientation: Z-pattern (vertical up)
  • Application: Non-health hazard (pollutant) backflow protection
  • Connection Type: Flanged, compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • Lay Length (Z-pattern): 32 13/16 inch (833 mm)
  • Shutoff Valves: OSY resilient wedge gate valve AWWA C515 (UL/FM)

Materials

  • Main Valve Body: 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

  • 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 the FEBCO LF870W/WZ 4 inch Double Check Valve Assembly?

This assembly is primarily used on potable drinking water systems to protect against possible backpressure and backsiphonage conditions for non-health hazard (pollutant) applications. It prevents polluted water from entering the clean water supply.

What type of installation patterns is this backflow preventer designed for?

The FEBCO LF870W/WZ is specifically designed for Z-pattern installations (vertical up/vertical down) and also approved for horizontal N-pattern installations, allowing for versatile drop-in replacement.

Is this 4 inch double check valve assembly considered "Lead Free"?

Yes, this assembly features Lead Free construction. The wetted surface of the product, which contacts consumable water, contains less than 0.25% lead by weight, complying with low lead installation requirements.

What is ArmorTek coating and why is it important for this valve?

ArmorTek is a patented three-part advanced epoxy system used to coat the iron components of the backflow preventer. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal surfaces, enhancing the longevity and reliability of the valve.

What is the maximum operating pressure for the FEBCO LF870W/WZ 4 inch valve?

This 4 inch double check valve assembly has a maximum working pressure of 175 psi (12.1 bar) and a continuous operating temperature range of 33°F to 140°F (0.5°C to 60°C).

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