The 1/4 inch NPT pressure connection and DIN 43650 plug (EN 175301-803) interface allow for straightforward integration into existing PLC or controller loops

serving as the final stage in the purification process

as they will pull air into the return line

making it the required professional grade for manifolds and valves operating in high-ambient or high-fluid temperature environments where standard coils would fail

This genuine replacement ensures optimal HVAC system efficiency by maintaining tight seating during the changeover process

McDonnell & Miller FS4-3T3-1 Switch 30067439-890 The 1/4 inch NPT pressure1" NPT In Line Low Flow Rate Liquid Flow Switch with Snap Acting SPDT Switch (Part Number 115300)