Xylem FS7-4 Industrial Liquid Flow Switch 1-1/4" NPT SPDT

The Xylem FS7-4 (McDonnell & Miller 119700) is an industrial liquid flow switch designed for reliable flow monitoring in commercial and industrial HVAC systems. This robust flow switch features a 1-1/4 inch NPT threaded connection and comes equipped with trimmable stainless steel paddles that can be adjusted to suit various pipe sizes and flow conditions.

Key Features:

• 1-1/4 inch NPT threaded connection for easy installation
• SPDT (Single Pole Double Throw) snap switch for versatile control applications
• Trimmable stainless steel paddles allow customization for optimal flow detection
• Durable brass body construction for long-lasting performance
• Suitable for monitoring liquid flow in boilers, chillers, and hydronic systems
• Part of the trusted McDonnell & Miller FS7-4 series

This flow switch is commonly used in heating and cooling applications to detect the presence or absence of liquid flow, providing critical protection against low-flow or no-flow conditions that could damage equipment. The adjustable paddle design ensures accurate flow detection across a range of operating conditions.