4 C500N-DOSY-C-FS

Item Number: F0206417
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$12,342.72
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Ames
  • Size: 4 inch
  • Weight: 266.0 lb
  • Housing & Sleeve Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Installation: Horizontal N-Pattern
  • Flood Sensor: SentryPlus Alert Technology
  • Shutoff Valves: Domestic OSY Resilient Seated Gate Valves
  • Bypass Meter: Cubic Feet per Minute (CFM)

Description

The Colt C500N-DOSY is a 4 inch reduced pressure detector backflow preventer assembly designed for fire protection systems. It safeguards potable water supplies from contamination caused by backsiphonage or backpressure from non-potable sources. This assembly features durable 304 stainless steel construction, domestic OSY resilient seated gate valves, and a horizontal N-pattern installation. Key features include a cubic feet per minute bypass meter for leak detection and a SentryPlus Alert flood sensor to detect excessive relief valve discharge, offering remote notification capabilities with an add-on kit. It is approved by AWWA, ASSE, CSA B64.4, UL, and FM.

Help Me Connect

The Colt™ C500N-DOSY Reduced Pressure Detector Backflow Preventer Assembly is designed for horizontal N-pattern installation. It features grooved fittings that allow for integral pipeline adjustment, simplifying the connection process to existing piping systems.

The flood sensor requires an add-on connection kit for active communication and alert relay capabilities. Available kit options include BMS, cellular communication, or the Nexa® platform through Wi-Fi.

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Additional Details

The Colt™ C500N-DOSY Reduced Pressure Detector Backflow Preventer Assembly is a 4 inch stainless steel unit designed to prevent the reverse flow of non-potable fire protection substances and water into the potable water supply, safeguarding against backsiphonage and backpressure.

This assembly monitors for unauthorized water use and detects excessive water discharge from the relief valve with its integrated flood sensor, providing critical alerts when connected to an add-on sensor kit.


WARNING: It is illegal to use this product in any plumbing system providing water for human consumption in the United States. Always check with local water authorities and building codes before installation into residential or commercial potable water supply systems.

Key Features

  • Compact and Lightweight Design: Significantly more compact and up to 70% lighter than traditional designs, making installation and service easier.
  • Durable Construction: Features 304 (Schedule 40) stainless-steel housing and sleeve for long-lasting performance.
  • Easy Installation: Equipped with grooved fittings for integral pipeline adjustment and simplified setup.
  • Efficient Performance: Patented link check modules minimize pressure loss for optimal flow.
  • Serviceability: Designed for unmatched ease of service, including a replaceable check disc rubber.
  • Meters Bypass: Includes a cubic feet per minute meter (CFM meter) to detect underground leaks and unauthorized water usage in fire sprinkler systems.
  • Flood Detection: Integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve.
  • Alerts & Monitoring: When paired with an add-on sensor connection kit, the flood sensor activates to relay alerts via BMS, cellular communication, or the Nexa® platform through Wi-Fi.
  • Shutoff Valves: Furnished with domestic OSY (Outside Stem and Yoke) resilient seated gate valves.
  • Supervisory Switch: Includes an integrated supervisory switch as an option on each gate valve of the OS&Y model.

Specifications

  • Model: C500N-DOSY-C-FS
  • Size: 4 inch
  • Installation Pattern: Horizontal N-Pattern
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F - 140°F (0.6°C - 60°C)

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: Lead-Free Bronze Body
  • Bolts & Fasteners: 300 Series Stainless Steel
  • Springs: Stainless Steel

Components

  • Shutoff Valves: Domestic OSY Resilient Seated Gate Valves
  • Flood Sensor: SentryPlus Alert® Technology (requires add-on kit for active alerts)
  • Bypass Meter: Cubic Feet per Minute (CFM) Meter
  • Supervisory Switch: Integrated option on OSY gate valves

Certificates & Approvals

  • AWWA C511-97
  • ASSE 1047
  • CSA B64.4 (ULC and FM Approved)
  • UL Classified
  • FM Approved
  • Approved by FCCHR at USC

FAQs

What is the primary purpose of this backflow preventer?

To protect potable water supplies from contamination by preventing the reverse flow of non-potable water, such as from fire protection systems, due to backsiphonage or backpressure.

What size piping is this backflow preventer compatible with?

This Colt C500N-DOSY assembly is designed for 4-inch piping systems.

What type of flood detection capabilities does this unit offer?

It includes an integrated flood sensor with SentryPlus Alert® technology to detect excessive water discharge from the relief valve. When paired with an add-on connection kit, it can relay alerts via BMS, cellular, or Wi-Fi.

What materials are used in the construction of this backflow preventer?

The housing and sleeve are made from 304 Schedule 40 stainless steel. Elastomers include EPDM, silicone, and Buna 'N', with lead-free bronze test cocks and stainless steel springs.

What are the key approvals and certifications for this product?

This assembly is approved by AWWA C511-97, ASSE 1047, CSA B64.4, UL Classified, FM Approved, and the Foundation for Cross-Connection Control and Hydraulic Research at USC.

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