4 LFC500N-BFG-C-FS
Item Number: F0124666Brand - Ames
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- Lead Free* construction (wetted surfaces <0.25% lead)
- Weight: 100.0 lb
- Backflow Preventer Size: 4 inch
- Housing & Sleeve Material: Type 304 Stainless Steel
- Configuration: Horizontal N Pattern
- Maximum Working Pressure: 175 psi
- Flood sensor with SentryPlus Alert® technology
- Grooved gear operated butterfly valves with tamper switch
- 70% lighter than traditional designs
Description
Description
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This 4 inch Colt LFC500 Reduced Pressure Detector Assembly features grooved gear operated butterfly valves with tamper switches for both the inlet and outlet connections.
The integrated flood sensor requires an add-on connection kit for activation and communication. Connection kit options include:
- Building Management Systems (BMS)
- Cellular communication
- Sensor Control Monitor for integration with BAS via RS‑485 Modbus or Nexa® platform via Wi-Fi

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Additional Details
This Colt™ 4 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly provides vital protection to potable water systems by preventing the reverse flow of fire protection substances and non-potable water. It is designed for health-hazard applications to protect against backsiphonage, backpressure, and to monitor unauthorized water use from fire protection systems.
Features
- Extremely compact design, 70% lighter than traditional models
- Constructed with a Type 304 (Schedule 40) stainless steel housing and sleeve
- Features grooved fittings for integral pipeline adjustment and grooved gear operated butterfly valves with tamper switches
- Includes a patented link check for lowest pressure loss and replaceable check disc rubber for unmatched ease of serviceability
- Equipped with a bottom-mounted cast stainless steel relief valve and a metered bypass (CFM meter) to detect leakage or unauthorized water use
- Integrated flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve
- Lead Free* construction ensures wetted surfaces contain less than 0.25% lead by weight to comply with installation requirements
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
- Body Material: Type 304 (Schedule 40) Stainless Steel
- Backflow Preventer Size: 4 inch
- Configuration: Horizontal N Pattern
- Shutoff Valves: Grooved Gear Operated Butterfly Valves with Tamper Switch
- Test Cocks: Lead Free Bronze Body
- Pins & Fasteners: 300 Series Stainless Steel
- Springs: Stainless Steel
- Elastomers: EPDM, Silicone, Buna-N
- Link Checks: Noryl®, Stainless Steel
- Check Discs: Reversible Silicone or EPDM
- Temperature Range: 33°F - 110°F (0.5°C – 43°C)
- Maximum Working Pressure: 175 psi (12.1 bar)
- Flood Sensor: Yes, with SentryPlus Alert® Technology
- Bypass Meter: CFM (Cubic Feet per Minute)
- Weight: 174 lb (79 kg)
Certificates & Approvals
- Foundation for Cross-Connection Control and Hydraulic Research (FCCCHR-USC)
- AWWA C511-97
- ASSE 1047
- CSA B64.4
- UL Classified
- FM Approved
- NSF Certified to NSF/ANSI 372
FAQs
What is the primary function of this backflow preventer?
Does this product include a flood sensor?
What are the main materials used in the construction of this backflow preventer?
What type of shutoff valves are included with this assembly?
What is the maximum operating pressure and temperature range for this device?
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