4 LF886-WZ-LG-GPM-FS

Item Number: F8007414
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$10,083.75
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Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 4 inch
  • Weight: 172.0 lb
  • Model: LF886WZ Z-Pattern Reduced Pressure Zone Detector Assembly
  • Lay Length: Competitor Z-Pattern Drop-in Replacement
  • Flood Sensor: Included for continuous discharge detection
  • Bypass Meter: Gallons Per Minute (GPM) for leak detection
  • Coating: ArmorTek® advanced epoxy for corrosion resistance
  • Construction: Lead Free with Stainless Steel internal components
  • Pressure Rating: 175 psi Maximum Working Pressure
  • Temperature Range: 33°F - 140°F
  • Approvals: FCCCHR-USC, ASSE 1047, UL Classified**, FM Approved**, IAPMO/CUPC, AWWA C511, CSA B64.4 (**Note: Less shutoff valve assemblies are not UL/FM approved.)

Description

The 4 inch FEBCO MasterSeries LF886WZ Reduced Pressure Zone Detector Assembly is a lead-free backflow preventer designed to protect potable water systems from high hazard/toxic fluids. Featuring a Z-pattern lay length, it serves as a direct drop-in replacement for many competitor valves. The ductile iron body is coated with ArmorTek® for superior corrosion resistance, complemented by stainless steel internal components for durability. An integrated flood sensor detects continuous relief valve discharge, offering advanced alert capabilities when paired with an optional connection kit. This assembly includes a GPM metered bypass for leak detection and is supplied without shutoff valves for installation flexibility. Item number F8007414.

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Compatibility & Installation

  • This FEBCO MasterSeries LF886WZ 4 inch Reduced Pressure Zone Detector Assembly is specifically designed for Z-pattern lay length installations, serving as a direct drop-in replacement for competitor's Z-pattern valves.
  • It is intended for installation on the potable water supply at cross-connection points to protect against backpressure and backsiphonage conditions in high hazard/toxic applications.
  • The integrated flood sensor requires an add-on connection kit (sold separately) to activate its alert capabilities. Without this kit, the sensor remains passive. Connection kit options include those for BMS, cellular communication, or the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform via Wi-Fi.
  • This assembly is supplied without shutoff valves, allowing for customization or integration into existing systems where shutoff valves are not required or are supplied separately.
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Additional Details

The FEBCO MasterSeries LF886WZ 4 inch Reduced Pressure Zone Detector Assembly provides robust protection against backpressure and backsiphonage conditions in high hazard/toxic applications for potable water systems. This model is designed for a Z-pattern installation and features a longer lay-length for direct replacement of competitor's valves without modifications.

This backflow preventer assembly is equipped with an advanced flood sensor with SentryPlus Alert® technology, designed to detect continuous water discharge from the relief valve. When paired with an optional add-on connection kit (sold separately), the sensor activates to relay alerts for potential flooding events via BMS, cellular communication, or integration with BAS through RS-485 Modbus or the Nexa® platform over Wi-Fi.

Construction & Durability

  • Features a ductile iron body coated with ArmorTek® advanced epoxy system for superior protection against microbial-induced corrosion (MIC) and general corrosion.
  • Equipped with a stainless steel relief valve seat and stainless steel check components for extended performance and durability.
  • Designed for inline serviceability without the need for special tools.
  • Lead Free construction meets low lead installation requirements.

Bypass System

  • Includes a gallons per minute (GPM) metered bypass to detect potential underground leaks and unauthorized water usage.
  • Bypass system is designed for inline serviceability with field replaceable seats and discs.

Installation and maintenance must comply with all required instructions, codes, and regulations, including ensuring proper drainage in the event of a discharge. The flood sensor does not replace these requirements. Watts® is not responsible for alert failures due to connectivity issues, power outages, or improper installation.

Specifications

  • Product Type: Reduced Pressure Zone Detector Assembly (Type II)
  • Model: LF886WZ
  • Nominal Size: 4 inch
  • Lay Length Pattern: Z-Pattern
  • Bypass Meter: Gallons Per Minute (GPM) Metered
  • Flood Sensor: Included
  • Shutoff Valves: Less Shutoff Valves (LG)

Materials

  • Main Valve Body: Ductile Iron Grade 65-45-12
  • Relief Valve Body: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek Powder Coating (internal and external surfaces)
  • Check Seats: Stainless Steel
  • Relief Valve Seat: Stainless Steel
  • Disc Holder: Stainless Steel
  • Elastomer Disc: Silicone
  • Spring: Stainless Steel
  • Clamp: AWWA C606

Pressure & Temperature

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Minimum 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 D Flange
  • **Note: Less gate valve assemblies are not UL Classified and FM Approved configurations.

Dimensions (4 inch, Z-Pattern)

  • Length (A): 32 13/16 inches (833 mm)
  • Width (B): 18 15/16 inches (481 mm)
  • Height (C): 7 inches (178 mm)
  • Inlet to Outlet Centerline (D): 27 3/4 inches (705 mm)
  • Inlet Side to Bypass (E): 18 3/4 inches (476 mm)
  • Outlet Side to Bypass (F): 15 1/2 inches (394 mm)
  • Total Height (G): 31 inches (787 mm)
  • Inlet Flange to Main Valve (H): 6 inches (152 mm)
  • Outlet Flange to Main Valve (I): 11 1/8 inches (283 mm)
  • Drain Clearance (J): 4 1/2 inches (114 mm)
  • Pipe Centerline to Top (K*): 23 1/4 inches (591 mm)
  • Approximate Weight (without shutoff valves): Less than 342 lbs (155 kg) *

* The provided weight (342 lbs) is for assemblies with OSY gate valves; this "Less Shutoff" configuration will weigh less.

FAQs

What does "WZ" signify in the model number LF886WZ?

"WZ" indicates that this backflow preventer assembly has a Z-pattern lay length. This design is specifically for drop-in replacement of existing Z-pattern competitor valves.

Does this backflow preventer come with shutoff valves?

No, this specific model (LF886W-WZ-LG-GPM-FS) is designated as "LG" (Less Shutoff) and does not include OS&Y gate valves. It is designed for installations where shutoff valves are supplied separately or are not required.

How does the flood sensor function, and what is required to activate it?

The integrated flood sensor detects continuous water discharge from the relief valve. To activate its alert capabilities for BMS, cellular, or Wi-Fi communication, an add-on connection kit (sold separately) is required. Without this kit, the sensor is passive.

What type of applications is this backflow preventer suitable for?

This assembly is designed to protect potable drinking water systems from backpressure and backsiphonage in high hazard/toxic applications, typically found in industrial installations where local governing codes mandate protection against non-potable water sources.

What is ArmorTek® coating, and what benefits does it provide?

ArmorTek® is a patented three-part advanced epoxy system applied to the ductile iron main valve and relief valve bodies. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates from general corrosion, enhancing the product's lifespan.

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