8 C400-OSY-FxG-FS
Item Number: F0191572Brand - Ames
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- Backflow Preventer Size: 8 inch
- Weight: 602.0 lb
- Body Material: Type 304 Stainless Steel
- Valve Type: OSY Resilient Seated Gate Valves
- Inlet Connection: Flanged
- Outlet Connection: Grooved
- Maximum Working Pressure: 175 PSI
- Lead Content: Less than 0.25% by wetted surface weight
- SentryPlus Alert® flood sensor for discharge detection
Description
Description
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Installation Orientation
- This assembly is approved for horizontal installation.
Connections
- The flanged inlet connects to a matching flanged pipe.
- The grooved outlet connects to a matching grooved pipe.
Flood Sensor Activation
The integrated flood sensor requires an add-on sensor connection kit (not included) for activation and to relay alerts for potential flooding events. This kit can enable connectivity via BMS, cellular communication, or the Nexa® platform through Wi-Fi or RS-485 Modbus for integration with Building Automation Systems (BAS).

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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 water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and/or backpressure. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards.
This assembly consists of a stainless steel body with a quick access sleeve, torsion spring check modules, OSY resilient seated gate valves with flanged inlet and grooved outlet, test cocks, and a bottom mounted pressure relief valve.
Flood Sensor Technology
- Features a SentryPlus Alert® flood sensor to detect excessive water discharges from the relief valve.
- An add-on sensor connection kit (not included) is required to activate the flood sensor for relaying alerts for potential flooding events.
- Connection kit options can enable integration with Building Automation Systems (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi, or offer cellular communication.
Design & Construction
- Extremely compact design that is 70% lighter than traditional designs, allowing for smaller enclosures.
- Housing and sleeve constructed from Type 304 (Schedule 40) stainless steel.
- Features drip tight shutoff valves and reversible check disc rubber.
- Includes groove couplings for easy installation and integral pipeline adjustment.
- Patented link check design for lowest pressure loss and unmatched ease of serviceability.
Specifications
- Backflow Preventer Size: 8 inch
- Valve Type: OSY Resilient Seated Gate Valves
- Inlet Connection: Flanged
- Outlet Connection: Grooved
- Body Material: Type 304 (Schedule 40) Stainless Steel
- Check Modules: Torsion Spring Link Check
- Elastomers: EPDM, Silicone, Buna 'N'
- Check Disc Material: Reversible Silicone or EPDM
- Test Cocks: Lead Free* Bronze Body
- Pins & Fasteners: 300 Series Stainless Steel
- Springs: Stainless Steel
- Temperature Range: 33°F - 140°F (0.5°C - 60°C)
- Maximum Working Pressure: 175 psi (12.1 bar)
- Lead Content: Wetted surface contains less than 0.25% of lead by weight
Certificates & Approvals
- Foundation for Cross-Connection Control and Hydraulic Research at USC (FCCCHR-USC)
- AWWA C511-97
- ASSE 1013
- CSA B64.4
- UL Classified
- FM Approved
- NSF Certified to NSF/ANSI 61-G
FAQs
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