The Febco 10" LF850 Double Check Valve Assembly is a lead-free backflow preventer designed to protect potable water systems from non-health hazard pollution. Featuring a durable ductile iron body with ArmorTek® epoxy coating for corrosion resistance, this MasterSeries® assembly includes OS&Y gate valves. It supports both horizontal and vertical up flow orientations and is serviceable in-line without special tools. Approved by ASSE, UL, FM, IAPMO, and CSA, it has a maximum working pressure of 175 psi and operates between 33°F and 140°F. Item number 0683079.
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Connections
This device features standard flange end connections, which are compliant to ASME B16.1 Class 125 and AWWA Class D Flange. It is designed for both horizontal and vertical up assembly flow orientations. This assembly is suitable for cross-connections identified as non-health hazard (pollutant) applications.
The 10 inch Febco LF850 MasterSeries® Double Check Valve Assembly is specifically designed to prevent the backflow of polluted water into potable water systems, protecting against both backsiphonage and backpressure conditions. This assembly is primarily used for non-health hazard (pollutant) applications, ensuring compliance with national plumbing codes and water authority requirements.
Features
In-line serviceable assembly requiring no special tools for maintenance.
Features a compact modular design with captured spring assembly.
Includes reusable and replaceable check discs and field replaceable seats.
Constructed with a ductile iron valve body design and stainless steel check components.
Coated with ArmorTek® technology, a patented 3-part advanced epoxy system designed to resist microbial-induced corrosion (MIC) and protect exposed metal surfaces.
Equipped with a winterization feature, including disc retainers and valve body drain cocks.
Features a clapper check assembly and commonality between first and second check components.
Uses OS&Y (Outside Stem & Yoke) gate valves.
This is a non-stock, special order item and could take up to 2 weeks or more to deliver. All non-stock items are non-refundable. Please be sure you order carefully. If you have ANY questions please contact us before ordering.
Coating: ArmorTek® Powder Coating (internal and external surfaces)
Lay Length: 72.625 inches
Approximate Weight (OS&Y): 1450 lbs
Performance
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
Connections
End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
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
Certified to NSF/ANSI 61-G
CSA B64.5
FAQs
What is the primary use of the Febco 10" LF850 Double Check Valve Assembly?
This assembly is designed to prevent the backflow of polluted water from entering potable water systems, specifically in non-health hazard (pollutant) applications due to backsiphonage or backpressure conditions.
What are the main components of the LF850 assembly?
It consists of a fused epoxy ductile iron body, domestic OS&Y resilient seated gate valves, top-mounted test cocks, two in-line independent positive seating check modules, captured springs, and replaceable check discs and seats.
Does the Febco LF850 require special tools for maintenance?
No, this double check valve assembly is designed for in-line servicing without the need for any special tools.
What is ArmorTek® coating and why is it used?
ArmorTek® is a patented three-part advanced epoxy coating system applied to the internal and external surfaces. It's engineered to limit microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the product's longevity.
What are the pressure and temperature limits for this device?
The maximum working pressure is 175 psi (12.1 bar), and it operates continuously within a temperature range of 33°F to 140°F (0.5°C to 60°C).
