Potter VSR Waterflow Alarm Switch with Retard for Reliable Fire Protection Systems

The Potter VSR Waterflow Alarm Switch is engineered to detect water movement within commercial and industrial fire sprinkler infrastructure. Installed directly into wet pipe, dry pipe, pre-action, or deluge sprinkler assemblies, this device provides early alerts during fire scenarios. The built-in pneumatic or electronic retard feature blocks transient water surges and pressure fluctuations, ensuring the alarm activates exclusively during genuine fire events while minimizing maintenance interruptions.

Built to satisfy rigorous code requirements, this waterflow switch ensures full compliance with NFPA 13 and NFPA 25 standards for life safety installations. The sensitive internal vane mechanism detects flow rates as low as 10 gallons per minute (38 LPM), meeting strict testing benchmarks for rapid response and dependable facility protection.

• Heavy-Duty Construction: Crafted from rugged ductile iron alongside corrosion-resistant copper and CPVC materials to withstand harsh moisture-prone environments.
• False Alarm Prevention: Features an adjustable retard mechanism that effectively prevents transient surges from triggering unnecessary alarms.
• Low-Flow Sensitivity: Internal paddle mechanism reliably detects water movement at flow rates starting at 10 gallons per minute (38 LPM).
• System Versatility: Seamlessly integrates into wet, dry, pre-action, and deluge fire sprinkler systems with flexible union fittings for straightforward maintenance.
• Hazardous Location Options: Specialized versions available with explosion-proof housings for safe operation in strict industrial zones.

Always verify local Authority Having Jurisdiction (AHJ) requirements and consult manufacturer technical cut sheets prior to job site installation.

Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)