McDonnell & Miller 304300 Snap Switch Els PW 17895 Installation Versatility: The non-positional design

Installation Versatility: The non-positional design and snap-off bracket allow for seamless integration in any orientation

extending the operational life of the HVAC control transformer

Key Benefits Universal Compatibility: Direct replacement for MARS 64 and 90-64

Key Benefits Adjustable Range: Precise

McDonnell & Miller 304300 Snap Switch Els PW 17895 Installation Versatility: The non-positional designThe McDonnell & Miller 304300, also identified as the FS1 17 Snap Switch Assembly, is the critical single pole, double throw (SPDT) replacement component designed for Series FS1, FS4 3D, FS5, FS6, and AFE 1 liquid flow switches. This industrial grade switch is engineered specifically for high sensitivity applications in hydronic heating and HVAC systems where detecting low or moderate flow rates is vital for system protection. As an OEM replacement