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