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