6 LFC500-DOSY-C-FS
Item Number: F0425244
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Regular price
$18,086.32
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Estimated transit time: 2 to 5 Business Days
Brand - Ames
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- Nominal Size: 6 inch
- Weight: 423.0 lb
- Housing Material: Type 304 Stainless Steel
- Maximum Working Pressure: 175 psi
- Lead Free* construction
- Integrated Flood Sensor with SentryPlus Alert® Technology
- Metered bypass detects leaks and unauthorized water use
- Domestic OSY Resilient Seated Gate Valves
- UL Classified and FM Approved
Description
Description
The Colt 6 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly protects potable water systems from contamination by preventing backflow from fire protection systems and other health hazards. This compact, durable unit features a Type 304 stainless steel body, domestic OSY flanged gate valves, and a bottom-mounted pressure relief valve. An integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges, with an optional connection kit enabling alerts via BAS or Wi-Fi. It includes a metered bypass for leak detection and unauthorized water use. This assembly is UL Classified, FM Approved, ASSE 1047, and NSF 372 certified, meeting strict Lead Free* requirements.
Help Me Connect
Help Me Connect
Main Line Connections
- The 6 inch domestic outside stem and yoke (OSY) resilient seated gate valves feature flanged connections for installation into the main pipeline.
Flood Sensor Connectivity
- An add-on sensor connection kit is required to activate the integrated flood sensor and enable communication. Without this kit, the sensor operates passively.
- Connection kit options allow integration with Building Automation Systems (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi connectivity.

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Additional Details
The Colt™ 6 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly provides protection to potable water systems by preventing the reverse flow of fire protection substances and non-potable water due to backsiphonage or backpressure. It is ideal for use in health-hazard applications, such as on fire sprinkler systems and at service line entrances.
Construction & Features
- Extremely compact design, up to 70% lighter than traditional designs, offering unmatched ease of serviceability with no special tools required for servicing.
- Constructed with a Type 304 (Schedule 40) stainless steel housing and sleeve.
- Includes two independent Link Check modules with reversible elastomer discs and a patented design for lowest pressure loss and drip-tight closure.
- Features domestic outside stem and yoke (OSY) resilient seated gate valves with drip-tight shutoff.
- Equipped with a corrosive-resistant bottom-mounted pressure relief valve and test cocks.
- A cubic feet per minute (CFM) bypass meter detects underground leaks and unauthorized water use from the fire sprinkler system.
- Lead Free* construction ensures compliance with installation requirements.
Flood Detection & Alerting
- Contains a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
- An add-on sensor connection kit is required to activate the flood sensor for relaying alerts for potential flooding events.
- Integrates with the Sensor Control Monitor to deliver maintenance alerts to Building Automation Systems (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi connectivity when paired with a connection kit.
- The OS&Y model includes an option for an integrated supervisory switch on each gate valve.
Specifications
- Product Type: Reduced Pressure Detector Assembly
- Nominal Size: 6 inch
- Brand: Ames Fire & Waterworks (A WATTS Brand) / Colt
- Housing & Sleeve Material: Type 304 (Schedule 40) Stainless Steel
- Elastomers: EPDM, Silicone, Buna-N
- Link Checks Material: Noryl®, Stainless Steel
- Check Discs Material: Reversible Silicone or EPDM
- Test Cocks Material: Lead Free* Bronze Body
- Pins & Fasteners Material: 300 Series Stainless Steel
- Springs Material: Stainless Steel
- Operating Temperature Range: 33°F - 110°F (0.5°C – 43°C)
- Maximum Working Pressure: 175 psi (12.1 bar)
- Valve Type: Domestic Outside Stem and Yoke (OSY) Resilient Seated Gate Valves
- Flood Detection: Integrated Flood Sensor with SentryPlus Alert® Technology
- Bypass: Metered (Cubic Feet Per Minute)
- Approximate Weight: 353 lb (160 kg)
Certificates & Approvals
- Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
- AWWA C511-97
- ASSE 1047
- cUPC
- CSA B64.4
- UL Classified
- FM Approved (for OSY models)
- NSF Certified to NSF/ANSI 372
- Lead Free* (Wetted surface contains less than 0.25% lead by weight)
FAQs
What is the primary function of this backflow preventer?
This backflow preventer assembly protects potable water systems by preventing the reverse flow of fire protection substances and non-potable water, safeguarding against contamination due to backsiphonage or backpressure.
What does "Lead Free" mean for this product?
The "Lead Free" designation indicates that the wetted surface of this product, when contacted by consumable water, contains less than 0.25% lead by weight, complying with Lead Free installation requirements.
How does the integrated flood sensor work?
The backflow preventer includes a flood sensor with SentryPlus Alert® technology that detects excessive water discharges from the relief valve. An add-on connection kit is required to activate and enable communication of these flood alerts.
What are the main connection types for this 6-inch model?
This 6-inch model features domestic outside stem and yoke (OSY) resilient seated gate valves with flanged connections for integration into the main pipeline.
What approvals and certifications does this backflow preventer hold?
This assembly is UL Classified, FM Approved, ASSE 1047, cUPC, CSA B64.4, AWWA C511-97, and NSF Certified to NSF/ANSI 372. It is also approved by the Foundation for Cross-Connection Control and Hydraulic Research at USC.
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