10 LF886W-LG-GPM-FS
Item Number: F8007389Brand - Febco
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- Size: 10 inch
- Weight: 987.0 lb
- Pattern: N-Pattern for competitor drop-in replacement
- Bypass Meter: Gallons per Minute (GPM)
- Flood Sensor: SentryPlus Alert® technology for discharge detection
- Shutoff Valves: Not included (LG option)
- Body Material: Ductile Iron with ArmorTek® corrosion-resistant coating
- Max. Working Pressure: 175 PSI
- Relief Valve Seat & Check Components: Stainless Steel
Description
Description
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Primary Use
This 10 inch lead free MasterSeries® reduced pressure detector backflow preventer assembly is intended for installation on potable water supply lines to protect against backpressure and backsiphonage conditions where high-hazard (toxic) fluids are present, such as in industrial installations and applications.
Compatibility & Installation
- This valve features a longer lay-length and an N-pattern design, making it suitable as a drop-in replacement for competitor N-pattern valves.
- End connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards, ensuring compatibility with standard flanged piping systems.
Sensor Connectivity
The integrated SentryPlus Alert® flood sensor is designed to detect excessive water discharges from the relief valve. For active alerts, it must be paired with an optional add-on connection kit. These kits enable the sensor to relay alerts to various systems, including:
- Building Management Systems (BMS)
- Cellular communication networks
- The Sensor Control Monitor, which integrates with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details
This 10 inch lead free MasterSeries® reduced pressure detector backflow preventer assembly is designed to protect potable water supplies from high-hazard (toxic) fluids in industrial installations and applications. It features a longer lay-length for easy drop-in replacement of competitor’s N-pattern valves.
This N-pattern assembly is supplied without shutoff valves (LG option) and includes a ductile iron body, replaceable stainless steel check seats, a gallons per minute (GPM) metered bypass, and ball valve test cocks. Improved with a stainless-steel relief valve seat and check components, these rugged assemblies offer enhanced dependability and extended valve life. This backflow assembly also 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 activates to relay alerts for potential flooding events through BMS, cellular communication, or Wi-Fi.
Main Valve Features
- Stainless steel relief valve seat and stainless steel check components for maximum performance and durability
- Longer lay-length for drop-in replacement of older valves
- Inline serviceable assembly; no special tools required for maintenance
- Captured modular spring assembly
- Reversible and replaceable discs
- Field replaceable seats
- Ductile iron valve body design with ArmorTek® coating technology to resist corrosion
- Modular and repairable pressure differential relief valve
- Clapper check assembly
- Captured O-ring design
Bypass Features
- Compact design; remains within the main valve assembly profile
- Inline serviceable ½ inch check assembly; no special tools required for servicing
- Field replaceable seat and disc
- Designed to detect potential underground water leaks and unauthorized water usage
Flood Sensor Features
- Sensor on relief valve for flood detection, activated by an add-on connection kit for Building Management Systems (BMS) or cellular network communication
- SentryPlus Alert® technology provides continuous discharge detection
It is important to read all installation and safety instructions provided by FEBCO and to consult local governing authorities for installation requirements prior to installation.
Specifications
- Size: 10 inch
- Pattern: N-Pattern
- Bypass Meter: Gallons per Minute (GPM)
- Flood Sensor: Yes, with SentryPlus Alert® Technology
- Shutoff Valves: Not included (LG option)
Materials
- Main Valve Body: Ductile Iron Grade 65-45-12
- Relief Valve Body: Ductile Iron Grade 65-45-12
- Coating: ArmorTek powder coating, applied to 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 C506
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