6 C500-DOSY-G-FS
Item Number: F0206414Brand - Ames
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- 6 inch Reduced Pressure Detector Backflow Preventer
- Weight: 423.0 lb
- 304 Stainless Steel Housing & Sleeve
- Domestic OSY Resilient Seated Gate Valves
- Integrated Flood Sensor with SentryPlus Alert® Technology
- Maximum Working Pressure: 175 PSI
- Temperature Range: 33°F - 140°F
- Lead Free* Bronze Body Test Cocks
- AWWA C511-97, ASSE 1047, CSA B64.4, cULus, FM Approved
Description
Description
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Connections
- The assembly features groove couplings for easy installation and integral pipeline adjustment.
Flood Sensor Activation
- An add-on sensor connection kit is required to activate the flood sensor's alert features. Without this kit, the flood sensor acts as a passive component and does not communicate.
- Compatible connection kit options include BMS, cellular communication, or the Sensor Control Monitor for integration with building automation systems (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details
This Colt™ 6 inch reduced pressure detector backflow preventer assembly is designed to protect potable water supplies from contamination.
It prevents the reverse flow of non-potable water and fire protection substances into the drinking water supply due to backsiphonage or backpressure, making it ideal for cross-connections identified as health hazards, such as fire sprinkler systems and service line entrances.
A WARNING: It is illegal to use this product in a plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Before installing this product, consult your local water authority, building and plumbing codes.
Key Components
- Stainless steel body with quick access sleeve
- Two independent Link Check modules
- Domestic outside stem and yoke (OSY) resilient seated gate valves
- Corrosion-resistant bottom-mounted pressure relief valve (cast stainless steel)
- Gallons per minute meter for leak and unauthorized water use detection
- Bronze body nickel plated test cocks (Lead Free*)
Flood Detection & Monitoring
- Integrated 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 active alerts. Without the connection kit, the flood sensor is a passive component and will not communicate with any other device.
- Connection kit options include BMS, cellular communication, and the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
- Optional integrated supervisory switch on each gate valve.
Design & Performance
- Extremely compact design, 70% lighter than traditional models.
- 304 (Schedule 40) stainless steel housing and sleeve.
- Groove couplings for easy installation and pipeline alignment.
- Patented link check for lowest pressure loss.
- Unmatched ease of serviceability with replaceable check disc rubber.
- Suitable for horizontal, "Z" pattern horizontal, and "N" pattern horizontal configurations.
NOTICE: The use of the flood sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including the need to provide proper drainage in the event of a discharge. Watts® is not responsible for the failure of alerts due to connectivity issues, power outages, or improper installation.
Specifications
General
- Product Type: Reduced Pressure Detector Backflow Preventer
- Assembly Size: 6 inch
- Model: C500-DOSY-G-FS
- Shutoff Valves: Domestic OSY Resilient Seated Gate Valves
- Meter: Gallons per Minute
Materials
- Housing & Sleeve: 304 (Schedule 40) Stainless Steel
- Elastomers: EPDM, Silicone, Buna 'N'
- Link Checks: Noryl®, Stainless Steel
- Check Discs: Reversible Silicone or EPDM
- Test Cocks Body: Lead Free* Bronze
- Pins & Fasteners: 300 Series Stainless Steel
- Springs: Stainless Steel
- Relief Valve: Cast Stainless Steel
Performance
- Maximum Working Pressure: 175 PSI (12.1 bar)
- Temperature Range: 33°F - 140°F (0.5°C - 60°C)
Certificates & Approvals
- Approved By: Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
- Certification: AWWA C511-97
- Certification: ASSE 1047
- Certification: CSA B64.4
- Certification: cULus Classified
- Certification: FM Approved (for OSY models)
- Certification: UL Classified (for OSY Resilient Seated Gate Valves)
- Certification: UL Certified (Safety Signaling, Control No. 3L38 for supervisory switch)
FAQs
What is the primary function of the 6-inch C500-DOSY-G-FS backflow preventer?
What materials are used in the construction of this backflow preventer?
How does the integrated flood sensor work, and what is needed to activate it?
What is the maximum operating pressure and temperature range for this assembly?
What are the key certifications and approvals for the Colt C500-DOSY-G-FS?
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