4 LF886-W-DOSY-GPM-FS

Item Number: F8007391
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$16,124.25
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • 4 inch Lead Free Reduced Pressure Zone Detector Assembly
  • ArmorTek® coated ductile iron body for corrosion resistance
  • Stainless steel relief valve seat and check components for durability
  • Domestic OSY resilient seated shutoff valves (UL Classified & FM Approved)
  • Gallons per minute (GPM) metered bypass for leak detection
  • Integrated flood sensor with SentryPlus Alert® technology
  • Maximum Operating Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F

Description

The 4-inch FEBCO MasterSeries LF886W Reduced Pressure Detector Backflow Preventer is a lead-free assembly designed to safeguard potable water systems from contamination due to backpressure and backsiphonage in high hazard industrial applications. It features a durable ArmorTek coated ductile iron body, stainless steel relief valve seat, and check components. This model includes domestic OSY shutoff valves, a GPM metered bypass for leak detection, and a SentryPlus Alert® flood sensor for discharge monitoring. Engineered for a longer lay-length, it provides a convenient drop-in replacement for competitor N-pattern valves. The maximum working pressure is 175 PSI.

Help Me Connect

This 4 inch lead free MasterSeries® reduced pressure detector backflow preventer assembly is designed to provide drop-in replacement of competitor’s valves in either the N-pattern or Z-pattern orientation.

The assembly is fitted with UL Classified and FM Approved inlet/outlet resilient seated shutoff valves and contains four (4) properly located resilient seated test cocks as specified by AWWA Standard C511.

The auxiliary bypass line contains a 5/8" x 3/4" Water Meter that complies with ANSI/AWWA Standard C700 coupled with an approved check assembly compliant to AWWA Standard C511.

The integrated flood sensor requires an add-on connection kit to enable communication for alerts. Connection kit options include systems for BMS, cellular communication, and the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform via Wi-Fi.

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Additional Details

This 4 inch lead free MasterSeries® reduced pressure detector backflow preventer assembly is designed to protect against high hazard (toxic) fluids in water services for industrial installations and applications. This valve features a longer lay-length for drop-in replacement of competitor’s N-pattern valves.

Main Valve Features

  • Stainless steel relief valve seat and stainless steel check components for maximum performance and durability
  • Longer gate-to-gate length for drop-in replacement of longer valves
  • Inline serviceable assembly; no special tools required
  • Captured modular spring assembly
  • Reversible and replaceable discs
  • Field replaceable seats
  • Ductile iron valve body design with ArmorTek® coating technology to resist corrosion of internals
  • Modular and repairable pressure differential relief valve
  • Clapper check assembly
  • Captured O-ring design
  • SentryPlus Alert® technology flood sensor on relief valve for flood detection, activated by add-on connection kit for BMS or cellular network communication

Auxiliary Bypass Features

  • Compact design; remains in main valve assembly profile
  • Inline serviceable 3/4" check assembly; no special tools required
  • No special tools required for servicing
  • Field replaceable seat and disc
  • Detect potential underground water leaks
  • Detect unauthorized water usage

Flood Sensor Details

This backflow assembly contains a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve. When paired with an add on connection kit, the sensor is activated to relay alerts for potential flooding events. Connection kit options include BMS, cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

WARNING: An add-on connection kit is required to activate the flood sensor. Without the connection kit, the flood sensor is a passive component that does not communicate with any other device.

WARNING: Use of the flood sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including the need to provide proper drainage in the event of a discharge.

WARNING: Watts® is not responsible for the failure of alerts due to connectivity issues, power outages, or improper installation.

Specifications

  • Size: 4 inch
  • Product Type: Reduced Pressure Zone Detector Assembly (Type II)
  • Valve Pattern: N-Pattern (Standard Orientation)
  • Main Valve Body Material: Ductile iron Grade 65-45-12
  • Relief Valve Body Material: Ductile iron Grade 65-45-12
  • Coating: ArmorTek powder coating (internal and external surfaces)
  • Shutoff Valves: OSY resilient wedge gate valve AWWA C515 (UL Classified and FM Approved)
  • Check Seats: Stainless steel
  • Relief Valve Seat: Stainless steel
  • Disc Holder: Stainless steel
  • Elastomer Disc: Silicone
  • Spring Material: Stainless steel
  • Clamp Material: AWWA C606

Bypass Specifications

  • Bypass Meter Type: Gallons Per Minute (GPM)
  • Bypass Meter Size: 5/8 inch x 3/4 inch
  • Bypass Meter Standard: ANSI/AWWA C700 Compliant
  • Bypass Check Assembly Standard: AWWA Standard C511 Compliant

Pressure & Temperature

  • Max. Working Pressure: 175 psi (12.1 bar)
  • Min. Working Pressure: 20 psi (1.4 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

  • Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • ASSE 1047
  • UL Classified (US & Canada)
  • FM Approved
  • IAPMO/CUPC
  • AWWA Standard C511 Compliant
  • CSA B64.4
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

FAQs

What is the primary purpose of this backflow preventer?

This FEBCO MasterSeries LF886W backflow preventer is designed to protect potable drinking water systems from contamination due to backpressure and backsiphonage, especially in high hazard/toxic applications.

What is SentryPlus Alert® technology?

SentryPlus Alert® technology refers to the integrated flood sensor on the relief valve. When paired with an add-on connection kit, it detects excessive water discharges and relays alerts via BMS, cellular communication, or Wi-Fi.

What are the key materials used in this backflow preventer?

The main valve body and relief valve body are made of ductile iron Grade 65-45-12, coated with ArmorTek® for corrosion resistance. Check seats, relief valve seat, disc holder, and springs are stainless steel, and elastomer discs are silicone.

What are the dimensions and lay length of this 4-inch model?

The 4-inch N-pattern model has a nominal lay length of 32 3/16 inches (818 mm) and a nominal height of 27 3/4 inches (705 mm). It is specifically designed for drop-in replacement of competitor N-pattern valves.

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

This backflow preventer has a maximum working pressure of 175 psi (12.1 bar) and operates continuously within a temperature range of 33°F to 140°F (0.5°C to 60°C).

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