Xylem 120610 Flow Switch 1 Inch

Product Description

The XYLEM 120610 is a flow switch designed to detect liquid movement in piping systems and trigger downstream control actions such as pump protection or alarm signaling. Sold under the McDonnell Miller brand and carrying model designation FS-254, this switch is built for commercial and residential hydronic, HVAC, and plumbing applications. The unit installs in a 1-inch pipe connection and is suited for systems where confirming flow presence is critical to safe operation. Licensed plumbers and HVAC mechanics are the primary installers for this type of device.

The FS-254 flow switch is commonly used in hydronic heating systems, chilled water loops, and water-source heat pump installations where a no-flow condition must be detected before equipment damage or unsafe operation can occur. It fits a 1-inch pipe and provides a reliable switching signal to controls, boilers, or chillers monitoring system flow status. This product is appropriate for both new installations and service replacements in commercial mechanical rooms and light commercial settings.

Key Features

• 1-inch pipe connection for direct inline installation
• Flow-detection switching action protects pumps and connected equipment from dry-run conditions
• Compatible with hydronic, chilled water, and HVAC water-loop applications
• Compact form factor at 1.9 pounds for straightforward field handling

Compatibility

Designed as an OEM-style replacement flow switch for 1-inch piping systems in hydronic heating, cooling, and water-source HVAC applications.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC mechanic. Shut off system water supply and relieve line pressure before removing or installing the switch. Ensure the paddle size matches the pipe diameter and flow range of the system. Follow applicable IPC and IFGC guidelines as well as local mechanical codes when integrating the switch into control circuits.

Technical Specifications

• Pipe Connection Size: 1 inch
• Weight: 1.9 pounds

Standard Information

• Brand: XYLEM
• Manufacturer Part Number: 120610