The 6 inch Colt Lead Free Reduced Pressure Detector Backflow Preventer Assembly is designed for fire protection systems and health hazard cross-connections, safeguarding potable water supplies from contamination. It features a compact, lightweight Type 304 stainless steel body with grooved OSY gate valves and patented link checks for minimal pressure loss. This assembly includes a gallon per minute meter for leak detection and a SentryPlus Alert® flood sensor to detect discharges and trigger alerts when connected to an add-on kit. Approved by ASSE, UL, FM, CSA B64.4, and NSF/ANSI 372, it ensures reliable performance up to 175 PSI in temperatures from 33°F to 110°F.
Help Me Connect
Connections
The 6 inch LFC500-OSY-G-FS backflow preventer assembly features grooved end connections for both the inlet and outlet.
These grooved connections facilitate integral pipeline adjustment and allow for easy installation into existing grooved piping systems.
The OS&Y gate valves are supplied with grooved connections, making them suitable for direct attachment to grooved pipe sections.
The Colt 6 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly prevents the reverse flow of fire protection substances and non-potable water into the potable water supply, protecting against backsiphonage and backpressure.
It is ideal for cross-connections identified as health hazards, such as on fire sprinkler systems and at the service line entrance to protect against contaminants.
Design and Construction
Features an extremely compact design that is 70% lighter than traditional models.
The body and sleeve are constructed from Type 304 (Schedule 40) stainless steel with grooved end connections.
Includes two torsion spring check modules, a corrosive resistant bottom-mounted pressure relief valve, and test cocks.
Equipped with outside stem and yoke (OSY) resilient seated gate valves with grooved inlet and outlet connections.
Features patented link checks with reversible silicone or EPDM discs for lowest pressure loss and drip-tight closure.
Comes furnished with a gallon per minute meter to detect underground leaks and unauthorized water use from the fire sprinkler system.
Flood Detection and Alert System
Integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve.
With an add-on connection kit, the sensor activates to relay alerts for potential flooding events.
Connection kit options include BMS, cellular communication, or the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
The OS&Y model includes an option for an integrated supervisory switch on each gate valve.
Specifications
Size: 6 inch
Housing & Sleeve Material: Type 304 (Schedule 40) Stainless Steel
Elastomers: EPDM, Silicone, Buna-N
Link Check Material: Noryl®, Stainless Steel
Check Disc Material: Reversible Silicone, EPDM
Test Cocks Body Material: Lead Free* Bronze
Pins & Fasteners Material: 300 Series Stainless Steel
Springs Material: Stainless Steel
Maximum Working Pressure: 175 PSI (12.1 bar)
Temperature Range: 33°F - 110°F (0.5°C – 43°C)
Certificates & Approvals
Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
AWWA C511-97
ASSE 1047
CSA B64.4
UL Classified
FM Approved
NSF Certified to NSF/ANSI 372
Dimensions (Approximate)
Length (A): 43 1/2 in (1105 mm)
Height (C OSY): 30 1/8 in (765 mm)
Width (D): 8 1/2 in (216 mm)
Face-to-Face (G): 44 3/4 in (1137 mm)
Relief Valve Clearance (H): 33 1/4 in (845 mm)
Weight: 353 lb (160 kg)
FAQs
What is the primary function of the 6 inch LFC500-OSY-G-FS backflow preventer?
This reduced pressure detector backflow preventer assembly is designed to protect potable water systems from contamination due to backsiphonage or backpressure. It is primarily used in fire protection systems and other health hazard cross-connections to prevent non-potable water or substances from entering the clean water supply.
What materials are used in the construction of this backflow preventer?
The housing and sleeve are constructed from Type 304 (Schedule 40) stainless steel. Link checks use Noryl® and stainless steel, while check discs are reversible silicone or EPDM. Test cocks are made from Lead Free* bronze, and pins, fasteners, and springs are stainless steel.
What are the maximum operating pressure and temperature ratings for this model?
The assembly has a maximum working pressure of 175 PSI (12.1 bar). It is designed to operate within a temperature range of 33°F to 110°F (0.5°C – 43°C).
How does the flood detection system work on this backflow preventer?
The unit features an integrated flood sensor with SentryPlus Alert® technology on the relief valve. When paired with an add-on connection kit, the sensor activates to detect excessive water discharges and relays alerts for potential flooding events via BMS, cellular, or Wi-Fi through the Sensor Control Monitor or Nexa® platform.
What type of connections does the 6 inch LFC500-OSY-G-FS model have?
This model is equipped with grooved end connections for both the inlet and outlet, utilizing outside stem and yoke (OSY) resilient seated gate valves. These grooved connections allow for integral pipeline adjustment and simplify installation into compatible grooved piping systems.
