Xylem 336900 Replacement Paddle Kit for FS4-3T-25 Flow Switch

The Xylem McDonnell & Miller 336900 is a genuine OEM replacement paddle kit designed for the FS4-3T-25 series liquid flow switches. This kit restores proper flow detection performance to your existing FS4-3T flow switch without the need for a full unit replacement.

Key Features:

• Genuine OEM replacement paddle kit for FS4-3T-25 series flow switches
• Compatible with FS4-3T1, FS4-3T2, and FS4-3T3 liquid flow switch models
• Includes paddles sized for a range of pipe configurations (1/2" and 1")
• Paddles available for low, medium, or high flow applications
• Rated for maximum liquid pressure of 160 psi (11.3 kg/cm²)
• Liquid temperature range: 32°F to 300°F (0°C to 149°C)
• In-line switch configuration — no pipe tee required

McDonnell & Miller, a Xylem brand, is an industry leader in flow switches, low-water cutoffs, and boiler controls for commercial and industrial HVAC and hydronic systems. The FS4-3T series is engineered for starting and stopping electrically operated equipment such as pumps, alarms, motors, and automatic burners. Replacing worn paddles with this genuine kit ensures accurate, reliable flow sensing and extends the service life of your flow switch.