8 C400N-OSY-FS
Item Number: F0191280Brand - Ames
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- Assembly Size: 8 inch
- Weight: 709.0 lb
- Housing & Sleeve: Type 304 (Schedule 40) stainless steel
- Maximum Working Pressure: 175 psi
- Temperature Range: 33°F - 140°F
- Configuration: Horizontal N-pattern
- Flood Sensor: SentryPlus Alert® technology
- Approvals: cULus Listed, FM Approved, NSF Certified, CSA B64.4, AWWA C511-97
- Check Discs: Reversible silicone or EPDM
Description
Description
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Installation Orientation
- Designed for horizontal N pattern installation.
- Must be installed in accordance with the direction of the flow arrow.
Pipe Connections
- Features groove couplings for easy installation and pipe alignment.
Sensor Connectivity (with add-on kit)
- Connects to BMS, cellular communication systems, or a Sensor Control Monitor.
- Sensor Control Monitor allows integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details
This Colt™ 8 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply due to backsiphonage and backpressure. It is approved for horizontal N pattern installation, making it ideal for continuous pressure piping applications and cross-connections identified as health hazards.
This assembly features a stainless steel body with a quick access sleeve, torsion spring check modules, resilient seated gate valves with outside stem and yoke, test cocks, and a bottom mounted pressure relief valve. It includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
Flood Detection Connectivity
- The flood sensor, when paired with an add-on connection kit, relays alerts for potential flooding events.
- Connection kit options allow for integration via BMS, cellular communication, or a Sensor Control Monitor for BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
Specifications
General
- Assembly Size: 8 inch
- Configuration: Horizontal N-pattern
- Design: Extremely compact
- Housing & Sleeve: Type 304 (Schedule 40) stainless steel
- 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
- Elastomers: EPDM, silicone, and Buna 'N'
Performance
- Temperature Range: 33°F - 140°F (0.5°C - 60°C)
- Maximum Working Pressure: 175 psi (12.1 bar)
Features
- Groove Fittings: For easy installation and pipe alignment
- Link Check: Patented for lower pressure loss
- Serviceability: Unmatched ease
- Shutoff Valves: Grooved butterfly valve
- Flood Sensor: On relief valve for flood detection
- Flood Alert: Activated with add-on sensor connection kit
- Supervisory Switch: Integrated option on each gate valve of the OS&Y model
Certificates & Approvals
- Approved By: Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
- Standard: AWWA C511-97
- Certification: cULus Listed
- Certification: FM Approved
- Certification: NSF Certified
- Certification: CSA B64.4
FAQs
What is the primary purpose of this backflow preventer?
What is the maximum working pressure and temperature range for this assembly?
What type of installation is this backflow preventer approved for?
What kind of flood detection technology does this backflow preventer include?
What connectivity options are available for the flood sensor?
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