This switch is connected to a controlled valve assembly to stop {TAIL ~ the flow} of water in response to the detection of {HEAD ~ water} by the switch 
This switch is connected to a controlled valve assembly to stop { TAIL ~ the flow } of water in response to the detection of { HEAD ~ water } by the switch
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH