The 8 inch Colt Lead Free Reduced Pressure Detector Backflow Preventer Assembly protects potable water systems from contamination in fire protection applications. This LFC500N-DOSY-C-FS model is ideal for health-hazard applications, preventing backflow due to backsiphonage or backpressure. It features durable Type 304 stainless steel construction, a flood sensor with SentryPlus Alert® technology, and a CFM meter for leak detection. Approved for horizontal N pattern installation, it includes UL Classified and FM Approved OSY gate valves and an integrated supervisory switch option. Maximum working pressure is 175 PSI.
Help Me Connect
Connections
This 8 inch reduced pressure detector backflow preventer assembly is designed for horizontal N pattern installation.
It features UL Classified and FM Approved outside stem and yoke resilient seated gate valves (OSY) with grooved inlet and outlet gate connections.
Flood Sensor Activation
The integrated flood sensor requires an add-on connection kit to be fully activated and communicate alerts.
Without the connection kit, the flood sensor acts as a passive component.
Connection kit options include BMS, cellular communication, or the Sensor Control Monitor for BAS/Nexa® integration via RS-485 Modbus or Wi-Fi.
This Colt™ 8 inch lead free reduced pressure detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and/or backpressure. It is approved for horizontal N pattern installation and includes a flood sensor with SentryPlus Alert® technology.
Features
Extremely compact design and 70% lighter than traditional designs
Housing and sleeve constructed from Type 304 (Schedule 40) stainless steel
Groove fittings for integral pipeline adjustment
Patented link check for lowest pressure loss
Unmatched ease of serviceability with no special tools required for servicing
Replaceable check disc rubber
UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves
Bottom-mounted cast stainless steel relief valve
Metered bypass with a CFM meter to detect leakage or theft of water from the fire sprinkler system
Integrated flood sensor on the relief valve with SentryPlus Alert® technology to detect continuous discharge
Flood alert feature activated by an add-on sensor connection kit
Includes an integrated supervisory switch as an option on each gate valve of the OS&Y model
NOTICE: An add-on connection kit is required to activate the flood sensor. Without the connection kit, the flood sensor is a passive component and will not communicate with any other device.
Specifications
Product Type: Reduced Pressure Detector Assembly
Size: 8 inch
Model: LFC500N-DOSY-C-FS
Configuration: N pattern horizontal
Valve Type: UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves
Housing & Sleeve: Type 304 (Schedule 40) Stainless Steel
Elastomers: EPDM, Silicone, Buna-N
Link Checks: Noryl®, Stainless Steel
Check Discs: Reversible Silicone or EPDM
Test Cocks: Lead Free* Bronze Body
Pins & Fasteners: 300 Series Stainless Steel
Springs: Stainless Steel
Performance
Temperature Range: 33°F – 110°F (0.5°C – 43°C)
Maximum Working Pressure: 175 PSI (12.1 bar)
Certificates & Approvals
Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC) (OSY only excluding N and Z configurations sizes 6" – 10")
AWWA C511-97
ASSE 1047
CSA B64.4
cULus Classified
FM Approved (**BFG & OSY Only)
NSF Certified to NSF/ANSI 372
FAQs
What is the primary use of this backflow preventer assembly?
This 8 inch Colt LFC500N-DOSY-C-FS Lead Free Reduced Pressure Detector Backflow Preventer Assembly is designed to protect potable water systems from contamination by fire protection substances due to backsiphonage and backpressure. It is typically used in health-hazard applications.
What does "Lead Free" mean for this product?
"Lead Free" indicates that the wetted surface of this product, which comes into contact with consumable water, contains less than 0.25% of lead by weight, complying with Lead Free* installation requirements.
How does the flood sensor feature work?
The integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. To activate flood alerts and communication, an add-on sensor connection kit is required.
What is the maximum operating pressure and temperature range?
This backflow preventer has a maximum working pressure of 175 PSI (12.1 bar). The operational temperature range is 33°F to 110°F (0.5°C to 43°C).
What type of connections does this assembly have?
This 8 inch LFC500N-DOSY-C-FS model features UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves. It comes with grooved inlet and outlet gate connections.
