This 4 inch FEBCO MasterSeries LF856 Lead Free Double Check Detector Backflow Preventer Assembly is designed for non-health hazard applications to prevent backflow into potable water supplies. It features a durable ductile iron body with ArmorTek® powder coating for enhanced corrosion resistance. The assembly includes a 5/8 inch x 3/4 inch GPM water meter in the bypass line for detecting leaks or unauthorized water usage, making it ideal for fire sprinkler and standpipe systems. It is ASSE 1048 Listed and complies with AWWA C510. The maximum working pressure is 175 psi.
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Installation & Connections
This assembly is designed for installation on the potable water supply at each point of cross-connection.
Ensures protection against backpressure and backsiphonage in non-health hazard applications.
End connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards.
The FEBCO MasterSeries LF856 4 inch Lead Free Double Check Detector Backflow Preventer Assembly is designed to protect potable water supplies from dangerous cross-connections by preventing the backflow of pollutants due to backsiphonage or backpressure.
It is ideal for non-health hazard applications such as fire sprinkler and standpipe systems, where detection of unauthorized water use is required.
Construction & Design
Ductile iron valve body construction
ArmorTek® coating, a patented three-part advanced epoxy system, protects against electrochemical and microbial-induced corrosion
Wetted surfaces contain less than 0.25% lead by weight
Designed for in-line servicing without special tools
Winterization feature with disc retainers and valve body drain ports
Clapper style check modules with stainless steel check components, replaceable seats, and disc rubbers
Two independently acting check modules
Auxiliary Bypass
Compact bypass design, remains within main valve assembly profile
In-line serviceable 5/8 inch x 3/4 inch Water Meter (GPM) for detecting leaks or unauthorized water usage
Lead Free: Yes (wetted surfaces contain less than 0.25% lead)
Body Material: Ductile Iron Grade 65-45-12
Coating: ArmorTek Powder Coating
Check Seat Material: Stainless Steel
Disc Holder Material: Stainless Steel
Elastomer Disc Material: Silicone
Spring Material: Stainless Steel
Bypass Meter: 5/8 inch x 3/4 inch Gallons Per Minute (GPM) Water Meter
Performance Ratings
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: Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
ASSE 1048 Listed
IAPMO
AWWA Standard C510 Compliant
End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
FAQs
What is the primary purpose of this backflow preventer?
This backflow preventer is designed to protect potable water supplies from contamination by preventing the backflow of non-health hazard pollutants due to backsiphonage or backpressure conditions.
Does this assembly include shutoff valves?
No, this specific model is configured "Less Shutoff Valves" (LG), as indicated by the product description and SKU. Shutoff valves must be sourced separately if required for your installation.
What is the maximum operating pressure for this device?
The maximum working pressure for the FEBCO MasterSeries LF856 4 inch assembly is 175 psi (12.1 bar).
How does the ArmorTek® coating benefit the backflow preventer?
The ArmorTek® coating is a patented three-part advanced epoxy system engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the longevity and durability of the ductile iron components.
Is this backflow preventer suitable for fire sprinkler systems?
Yes, it is primarily used on fire sprinkler and standpipe systems where detection of unauthorized water use is required, thanks to its integrated GPM metered bypass.
