2 LF850U-QT DC

Item Number: 0122968
1 1
$1,578.75
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Nominal Size: 2 inch
  • Weight: 26.2 lb
  • Lead Free cast copper silicon alloy construction
  • Compact modular design for easy in-line maintenance
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 32°F to 140°F
  • Equipped with quarter-turn lever handles
  • NPT ANSI/ASME B1.20.1 union end connections
  • Includes freeze sensor for temperature monitoring (requires separate connection kit)
  • Approved by ASSE 1015, CSA B64.5, and NSF/ANSI 61-G

Description

The FEBCO LF850 Small 2 inch Lead Free Double Check Valve Backflow Preventer is designed to protect potable water supplies from polluted water due to backsiphonage or backpressure. Its lead free cast copper silicon alloy construction complies with national codes. The compact modular design with a single access cover allows for easy in-line maintenance. It features NPT union end connections, quarter-turn ball valve shutoffs, and a maximum working pressure of 175 PSI. An integrated freeze sensor is included for temperature monitoring, requiring a separate connection kit for activation. Ideal for non-health hazard cross-connection control.

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Connections

  • This assembly features NPT ANSI/ASME B1.20.1 end connections with union ball valve shutoffs.
  • The NPT threaded ends are designed to connect to compatible NPT (National Pipe Taper) threaded piping systems.
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Additional Details

This 2 inch lead free small diameter double check valve backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements.

Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs, making it ideal for protection in continuous pressure piping applications and at cross-connections identified as non-health hazards.

WARNING: The integrated freeze sensor provides alerts about a possible freeze event but cannot prevent it from occurring. User action is required to prevent freeze conditions from causing product and/or property damage. An add-on connection kit (sold separately) is required to activate the freeze sensor; without it, the sensor is a passive component and does not communicate with any other device.

Features

  • Constructed with Lead Free cast copper silicon alloy for durability and compliance with reduced lead content requirements.
  • Designed with two in-line independent positive seating check modules.
  • Equipped with union end connections and quarter-turn ball valve shutoffs.
  • Features top-mounted test cocks for easy testing.
  • Includes replaceable seats and seat discs for simplified maintenance.
  • Available with a freeze sensor connection kit (sold separately) to activate a monitoring system that triggers alerts for low and freezing temperatures.
  • End connections are NPT ANSI/ASME B1.20.1.

Specifications

  • Nominal Size: 2 inch
  • Product Type: Double Check Valve Assembly
  • Series: LF850 Small

Materials

  • Valve Body: Lead Free* cast copper silicon alloy
  • Elastomers: Silicone
  • Springs: Stainless steel
  • Seat: Noryl®
  • Poppet: Noryl
  • Disc Retainer: Noryl
  • Guide: Noryl
  • Retainer Spacer: Noryl
  • Ball Valve: Lead Free* cast copper silicon alloy
  • Test Cock: Lead Free* cast copper silicon alloy
  • Hex HD Capscrew: Stainless steel
  • Identification Plate: Brass
  • Drive Screw Stick: Stainless steel

Performance

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Hydrostatic Test Pressure: 350 psi (24.1 bar)
  • Temperature Range: 32°F to 140°F (0°C to 60°C)

Connections

  • End Connections: NPT ANSI/ASME B1.20.1
  • Shutoff Valve Type: Quarter Turn Ball Valves
  • Shutoff Connection Type: Union

Certificates & Approvals

  • ASSE 1015
  • CSA B64.5
  • NSF/ANSI 61-G
  • USC-FCCCHR
  • ANSI/AWWA Conformance (C510-92)
  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

FAQs

What is the primary function of the FEBCO LF850 Small Double Check Valve Assembly?

This 2 inch double check valve assembly is designed to prevent the backflow of polluted water into the potable water supply, protecting against contamination from backsiphonage and backpressure in non-health hazard applications.

What materials are used in the construction of this backflow preventer?

The valve body is constructed from Lead Free cast copper silicon alloy. Internal components such as elastomers are silicone, while springs are stainless steel, and seats/poppets are Noryl®.

What are the maximum operating pressure and temperature range for this 2-inch model?

This backflow preventer has a maximum working pressure of 175 psi (12.1 bar) and operates within a temperature range of 32°F to 140°F (0°C to 60°C).

Are the internal components easily maintainable or replaceable?

Yes, the compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It also features replaceable seats and seat discs.

Does this backflow preventer include a freeze sensor?

Yes, it includes a freeze sensor for monitoring temperature. However, an add-on connection kit (sold separately) is required to activate the monitoring system and enable alerts.