4 LF880V-OSY-FS
Item Number: F122959
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Regular price
$14,085.07
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Estimated transit time: 2 to 5 Business Days
Brand - Febco
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- Nominal Size: 4 inch
- Weight: 465.0 lb
- Body Material: Lead Free Ductile Iron
- Coating: Patented 3-part ArmorTek® Epoxy
- Shutoff Valves: Outside Stem and Yoke (OSY)
- Relief Valve Seat: Stainless-Steel
- Protects against high hazard (toxic) fluids
- Integrated Flood Sensor with SentryPlus Alert® Technology
- Configurable N-Pattern design
Description
Description
This 4 inch FEBCO MasterSeries® reduced pressure zone backflow preventer assembly provides critical protection against high hazard (toxic) fluids in industrial water services. Constructed with a lead-free ductile iron body and a patented 3-part ArmorTek® epoxy coating, it offers advanced resistance to corrosion. The assembly features outside stem and yoke (OSY) shutoff valves, a stainless-steel relief valve seat, and stainless-steel check components for enhanced durability and performance. It includes a flood sensor with SentryPlus Alert® technology to detect relief valve discharge, with options for integrating alerts into building management systems or Wi-Fi platforms via add-on connection kits. Item number F122959.
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Sensor Integration & Connectivity
- This backflow preventer features a built-in flood sensor with SentryPlus Alert® technology designed to detect continuous relief valve discharge.
- For active flood monitoring and alerts, this assembly is compatible with various add-on sensor connection kits (sold separately).
- Connection kits offer options for BMS, cellular communication, or the Sensor Control Monitor.
- The Sensor Control Monitor enables integration with Building Automation Systems (BAS) via RS-485 Modbus or the Nexa® platform via Wi-Fi connectivity.

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Additional Details
This 4 inch lead free MasterSeries® reduced pressure zone backflow preventer assembly protects against high hazard (toxic) fluids in water services to industrial installations and applications.
Featuring outside stem and yoke (OSY) shutoff valves, this assembly includes a lead free body, test cocks, spring loaded check valves, and a pressure differential relief valve.
Construction & Durability
- The ductile iron body is fused with a patented 3-part ArmorTek® epoxy coating system, providing advanced corrosion resistance and limiting microbial induced (MIC) and exposed metal substrate corrosion.
- Improved with a stainless-steel relief valve seat and stainless-steel check components for maximum performance, greater dependability, and extended valve life.
- Configurable N-Pattern design.
Advanced Monitoring
- Contains a flood sensor with SentryPlus Alert® technology to detect continuous discharge from the relief valve.
- When paired with an add-on sensor connection kit (sold separately), the sensor activates to relay alerts for potential flooding events.
- Connection kit options include BMS, cellular communication, and the Sensor Control Monitor, enabling integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
Specifications
- Assembly Type: Reduced Pressure Zone Backflow Preventer
- Nominal Size: 4 inch
- Body Material: Lead Free Ductile Iron
- Coating: Patented 3-part ArmorTek® Epoxy Coating
- Shutoff Valves: Outside Stem and Yoke (OSY)
- Relief Valve Seat Material: Stainless-Steel
- Check Component Material: Stainless-Steel
- Pattern: N-Pattern (Configurable)
- Fluid Type: High Hazard (Toxic) Fluids
- Monitoring: Flood Sensor with SentryPlus Alert® Technology
- Connectivity: Compatible with Add-On Sensor Connection Kits for BMS, Cellular, RS-485 Modbus (via Sensor Control Monitor), Wi-Fi (via Nexa® platform)
FAQs
What type of fluids does this backflow preventer protect against?
This 4 inch FEBCO LF880V backflow preventer assembly is designed to protect against high hazard (toxic) fluids in water services. It is suitable for various industrial installations and applications.
What is the body material and why is ArmorTek® coating important?
The body is constructed from lead-free ductile iron. It features a patented 3-part ArmorTek® epoxy coating system, which provides advanced corrosion resistance and helps limit microbial induced (MIC) and exposed metal substrate corrosion, extending the assembly's lifespan.
Does this backflow assembly include a flood sensor?
Yes, this assembly contains a flood sensor with SentryPlus Alert® technology. This sensor is designed to detect continuous water discharges from the relief valve.
How does the flood sensor connect to monitoring systems?
The flood sensor can be paired with an add-on sensor connection kit (sold separately). These kits allow integration with Building Management Systems (BMS), cellular communication, or a Sensor Control Monitor for alerts via RS-485 Modbus or Wi-Fi through the Nexa® platform.
What type of shutoff valves does this assembly use?
This backflow preventer assembly is equipped with outside stem and yoke (OSY) shutoff valves.
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