The Febco 6 inch LF850 Lead Free Double Check Valve Assembly is engineered to prevent the backflow of polluted water into potable drinking water systems. Ideal for non-health hazard applications, this MasterSeries assembly features a durable ductile iron body with a patented ArmorTek® epoxy coating for superior corrosion resistance. It includes OS&Y gate valves, stainless steel check components, and replaceable seats and discs for easy in-line servicing without special tools. Designed for continuous pressure piping, it ensures compliance with national plumbing codes and water authority requirements for backsiphonage and backpressure protection. Item number 0683077.
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Connections
The 6 inch Febco LF850 Double Check Valve Assembly comes with standard flanged end connections.
These connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards, ensuring compatibility with standard flanged piping systems.
The assembly is installed on the potable water supply line to protect against backflow in continuous pressure piping applications.
The 6 inch Febco MasterSeries LF850 Lead Free Double Check Valve Assembly is designed to protect potable water systems from backflow due to backsiphonage and backpressure in non-health hazard (pollutant) applications.
This assembly prevents polluted water from entering the drinking water supply in accordance with local codes and water authority requirements.
Features
In-line serviceable assembly requiring no special tools for maintenance.
Features a compact modular design for easy in-line repairs.
Equipped with reversible and replaceable check discs and field replaceable seats.
Ductile iron valve body design with stainless steel check components.
Utilizes ArmorTek® coating technology, a patented three-part advanced epoxy system, to resist microbial-induced corrosion (MIC) and protect exposed metal surfaces.
Includes OS&Y (Outside Stem & Yoke) resilient seated gate valves.
Designed with a winterization feature including disc retainers and valve body drain ports.
Lead Free* construction ensures the wetted surface contains less than 0.25% lead by weight.
Features clapper check assembly, captured modular spring assembly, and captured O-ring design.
Lead Content: Wetted surface contains less than 0.25% lead
Pressure & Temperature
Maximum Working Pressure: 175 psi (12.1 bar)
Minimum Working Pressure: 10 psi (0.7 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 the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
ASSE 1015 Listed
UL Classified (U.S. & Canada)
FM Approved
IAPMO
CSA Listed
AWWA Standard C510 Compliant
End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
Certified to NSF/ANSI 61-G
CSA B64.5
FAQs
What type of backflow protection does the Febco LF850 provide?
The Febco LF850 Double Check Valve Assembly provides protection against backsiphonage and backpressure conditions for non-health hazard (pollutant) applications, preventing polluted water from entering the potable water supply.
What materials are used in the construction of this backflow preventer?
The main valve body is made of ductile iron Grade 65-45-12, coated with ArmorTek® advanced epoxy. It features stainless steel check seats, disc holders, and springs, with silicone elastomer discs.
Is the Febco LF850 assembly easy to maintain?
Yes, it features an in-line serviceable, compact modular design that requires no special tools for servicing. Components like check discs and seats are reversible and replaceable.
What are the maximum operating pressure and temperature range for this assembly?
This assembly has a maximum working pressure of 175 psi (12.1 bar) and operates continuously within a temperature range of 33°F to 140°F (0.5°C to 60°C).
Does this product meet lead-free requirements?
Yes, the Febco LF850 is constructed with Lead Free* materials, meaning the wetted surface of the product contains less than 0.25% of lead by weight, complying with low lead installation requirements.
