McDonnell & Miller FS4-3T1-1 General Purpose Liquid Flow SwitchThe General Purpose Liquid Flow Switch is a McDonnell & Miller FS4 3T1 1 unit featuring a paddle type, universal design for 1 inch piping with threaded ends. This SPDT snap switch provides reliable control across heating, cooling, and process lines, delivering durable performance in demanding environments. Nominal Size: 1 inch. End connections: Threaded x Threaded. Temperature rating: 32300F. Pressure rating: 160 PSI. Flow rate: 511. 5 GPM (flow); 3.

this cover protects sensitive components while maintaining a clean

model 390000596

Lead type: Radial through-hole for PCB mounting

Built to Armstrong’s exacting standards

Designed for potable water installations

Function: Replacement evaporator pad to maintain airflow and cooling efficiency

The compact design fits tight installation spaces

helping extend regulator life in outdoor settings

heat-resistant materials to resist wear and maintain efficient flame operation

Use this panel to maintain equipment aesthetics and protect internal components

shell and tube heat exchangers

making it ideal for boiler rooms