Surplus new Mcdonnell Miller part 114641 fs4-3s GENERAL PURPOSE LIQUID flow switch 1 npt. FS4-3S 114641 FS4-3 w/SS body, monel bellows. The McDonnell & Miller 114641 is a general-purpose liquid flow switch model FS4-3S with a 1" NPT connection, stainless steel body, and Monel bellows.
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