10 LF860-DOSY-FS

Item Number: F683103
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$49,206.61
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 10 inch
  • Weight: 1480.0 lb
  • Application: High Hazard/Toxic Backflow Prevention
  • Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek Epoxy for Corrosion Resistance
  • Shutoff Valves: OSY Resilient Wedge Gate Valves
  • Relief Valve Seat: Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Flood Sensor: SentryPlus Alert Technology

Description

This 10 inch FEBCO MasterSeries LF860 reduced pressure zone backflow preventer assembly provides critical protection against backpressure and backsiphonage for high hazard/toxic applications in potable water systems. It features a durable ductile iron body with patented ArmorTek epoxy coating for superior corrosion resistance and stainless-steel internal components for maximum performance. Equipped with OSY gate valves and an integrated flood sensor with SentryPlus Alert technology, this lead-free assembly ensures reliability and compliance with stringent water utility codes. Its inline serviceable design requires no special tools, simplifying maintenance. Item number F683103.

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Connections & Compatibility

  • This 10 inch LF860 assembly is designed for installation on potable water supply lines in commercial and industrial settings requiring protection against high hazard backpressure and backsiphonage.
  • It is fitted with domestic outside stem and yoke (OSY) resilient seated gate valves for shutoff.
  • End connections are compliant to ASME B16.1 Class 125 & AWWA Class D Flange standards.
  • The integrated flood sensor can be activated with an add-on connection kit (sold separately) for communication via BMS (Building Management Systems), cellular networks, or Wi-Fi through the Sensor Control Monitor and Nexa® platform.
  • The assembly is suitable for horizontal flow orientation.
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Additional Details

This 10 inch lead free MasterSeries® reduced pressure zone backflow preventer assembly is designed to protect against backpressure and backsiphonage conditions for high hazard/toxic fluids in potable water systems.

It is primarily used in water services for industrial installations and applications where local codes mandate protection from non-potable water sources.

Construction & Features

  • Features an epoxy coated ductile iron body, domestic outside stem and yoke (OSY) resilient seated gate valves, test cocks, spring-loaded check valves, and a pressure differential relief valve.
  • The ductile iron body is fused with patented 3-part ArmorTek® epoxy coating for advanced corrosion resistance, reducing both microbial induced corrosion (MIC) and exposed metal substrate corrosion.
  • Improved with a stainless-steel relief valve seat and stainless-steel check components for maximum performance, durability, and extended valve life.
  • This assembly contains a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • An add-on connection kit is required to activate the flood sensor. Without the connection kit, the sensor is a passive component. Connection kit options include BMS, cellular communication, and the Sensor Control Monitor for integration with BAS via RS‑485 Modbus or the Nexa® platform through Wi-Fi.
  • Servicing is inline and requires no special tools.
  • The flood sensor does not replace the need to comply with all required installation, operation, and maintenance instructions, codes, and regulations for this product. Proper drainage must still be provided in the event of a discharge. Watts® is not responsible for the failure of alerts due to connectivity issues, power outages, or improper installation.

Specifications

General

  • Product Type: Reduced Pressure Zone Backflow Preventer Assembly
  • Series: MasterSeries LF860
  • Size: 10 inch
  • Application: High Hazard/Toxic, Backpressure & Backsiphonage Protection
  • Serviceability: Inline, No Special Tools Required
  • Lead Free: Yes (Wetted surface contains less than 0.25% lead by weight)

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)
  • Shutoff Valves: OSY Resilient Wedge Gate Valve (AWWA C515, UL Classified, FM Approved)
  • Check Seats: Stainless Steel
  • Relief Valve Seat: Stainless Steel
  • Disc Holder: Stainless Steel
  • Elastomer Disc: Silicone
  • Spring: Stainless Steel
  • Clamp: Stainless Steel

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

  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at USC (FCCCHR-USC)
  • ASSE 1013 Listed
  • UL Classified (US & Canada)
  • FM Approved
  • IAPMO
  • AWWA Standard C511 Compliant
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • NSF Certified to NSF/ANSI 61-G
  • CSA B64.4

Dimensions & Weight (OSY Gate Valves)

  • Overall Length (A): 72 5/8 inch (1845 mm)
  • Width (B): 46 3/8 inch (1178 mm)
  • Height (C): 15 5/8 inch (397 mm)
  • Distance (D): 13 3/4 inch (348 mm)
  • Distance (F**): 48 inch (1219 mm)
  • Distance (G): 9 inch (229 mm)
  • Distance (H): 12 3/8 inch (314 mm)
  • Weight: 1243 lb (564 kg)

FAQs

What type of fluid protection does the LF860 assembly provide?

The LF860 reduced pressure zone assembly is designed to protect potable water systems from backpressure and backsiphonage conditions, specifically for high hazard/toxic fluids.

What is the purpose of the ArmorTek coating?

The ArmorTek coating is a patented three-part advanced epoxy system applied to the ductile iron body. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal surfaces, enhancing the assembly's durability.

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

The flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. To activate it for alerts (call, email, text), an add-on connection kit (available separately) is required, which enables communication with BMS, cellular networks, or Wi-Fi.

Are special tools needed to service this backflow preventer?

No, the LF860 reduced pressure zone assembly features an inline serviceable design that does not require any special tools for maintenance.

What are the maximum operating pressure and temperature limits for this 10 inch model?

This 10 inch LF860 assembly has a maximum working pressure of 175 psi (12.1 bar) and can operate continuously within a temperature range of 33°F to 140°F (0.5°C to 60°C).

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