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