6 LF880-W-LG-FS
Item Number: F8007369Brand - Febco
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- Nominal Size: 6 inch
- Weight: 406.0 lb
- Reduced Pressure Zone (RPZ) Backflow Preventer
- Configuration: Less Shutoff Valves (LG)
- Flood Sensor: SentryPlus Alert® technology
- Body Material: Ductile Iron Grade 65-45-12
- Corrosion Resistance: ArmorTek® epoxy coating
- Maximum Working Pressure: 175 psi
- Temperature Range: 33°F - 140°F continuous
Description
Description
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Compatibility & Connections
This 6-inch backflow preventer is designed for drop-in replacement of competitor's N-pattern valves, offering a longer gate-to-gate lay length. Its end connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards.
For enhanced monitoring, the integrated flood sensor can be activated by an add-on connection kit (sold separately). These kits allow for communication with:
- Building Automation Systems (BMS)
- Cellular communication networks
- The Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details
The 6 inch Lead Free FEBCO MasterSeries LF880W Reduced Pressure Zone Backflow Preventer Assembly is designed to protect potable drinking water systems from high hazard (toxic) fluids due to backpressure and backsiphonage conditions. This assembly is suitable for industrial installations and applications, featuring a longer lay-length for drop-in replacement in N-pattern orientations.
This backflow preventer assembly is supplied without shutoff valves and includes a lead free body, test cocks, spring-loaded check valves, and a pressure differential relief valve. It incorporates ArmorTek® coating technology to protect iron components from corrosion and features a stainless-steel relief valve seat and stainless-steel check components for enhanced performance and durability.
Flood Sensor Features
- Equipped with 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 activates to relay alerts for potential flooding events.
- Connection kit options allow integration with Building Automation Systems (BMS), cellular communication, or the Nexa® platform via Wi-Fi.
Construction & Design
- Lead Free construction complies with low lead installation requirements.
- Designed for inline serviceability without special tools.
- Features a captured modular spring assembly and clapper check assembly.
- Includes reversible and replaceable discs and field replaceable seats.
- Ductile iron valve body design.
An add-on connection kit is required to activate the flood sensor; without it, the sensor is a passive component that does not communicate. The flood sensor does not replace compliance with all installation, operation, and maintenance instructions, codes, and regulations, including proper drainage for discharge. Watts is not responsible for alert failures due to connectivity issues, power outages, or improper installation.
Specifications
General
- Product Type: Reduced Pressure Zone (RPZ) Backflow Preventer
- Nominal Size: 6 inch
- Configuration: Less Shutoff Valves (LG)
- Pattern: N-pattern (Horizontal)
- Sensor: Flood Sensor (FS) with SentryPlus Alert® technology
- Application: High Hazard (Toxic)
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)
- Check Seats: Stainless steel
- Relief Valve Seat: Stainless steel
- Disc Holder: Stainless steel
- Elastomer Disc: Silicone
- Spring: Stainless steel
- Clamp: AWWA C606
Performance & Operating Conditions
- 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
- Approved by: Foundation for Cross-Connection Control and Hydraulic Research (FCCCHR USC)
- Listed by: ASSE 1013
- Listed by: UL Classified (US & Canada)
- Approved by: FM
- Listed by: IAPMO/CUPC
- Compliant to: AWWA Standard C511
- Compliant to: ASME B16.1 Class 125 & AWWA Class D Flange (End Connections)
- Certified to: NSF/ANSI 61-G
- Certified to: CSA B64.4