In the absence of pressurized water flow, the bar magnet drops into {TAIL ~ magnetic field} coupling proximity with {HEAD ~ the reversing reed switch SW2} 
In the absence of pressurized water flow , the bar magnet drops into { TAIL ~ magnetic field } coupling proximity with { HEAD ~ the reversing reed switch SW2 }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD