McDonnell & Miller FS8-W SPDT 1" Flow Switch NEMA 4X

The McDonnell & Miller FS8-W is a general-purpose flow switch designed for reliable flow monitoring in commercial and industrial HVAC and plumbing applications. This SPDT (single pole, double throw) switch features a 1-inch connection size and is built to detect liquid flow in pipes, providing critical system protection and control.

Key Features:

• SPDT switching configuration for versatile control applications
• 1-inch NPT connection for easy installation in standard piping systems
• NEMA 4X rated enclosure provides superior protection against water, dust, and corrosion in harsh environments
• Adjustable flow setpoint allows customization for specific system requirements
• Paddle-style flow sensor provides dependable mechanical operation
• Direct replacement for FS8-V model (part number 120601)

This flow switch is commonly used in boiler systems, chilled water applications, cooling towers, and other liquid flow monitoring applications where reliable switching and environmental protection are required. The rugged NEMA 4X construction makes it suitable for both indoor and outdoor installations.