A magnet is mounted therein to a displaceable member and moved into and out of {TAIL ~ magnetic field} coupling proximity to a timing reed switch in response to the onset and termination of pressurized water flow through {HEAD ~ the water flow sensing unit} 
A magnet is mounted therein to a displaceable member and moved into and out of { TAIL ~ magnetic field } coupling proximity to a timing reed switch in response to the onset and termination of pressurized water flow through { HEAD ~ the water flow sensing unit }
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