Optionally, a pressure sensor may be placed on the output side of the pump to provide an indication of {HEAD ~ an empty reservoir} or a substantial blockage in {TAIL ~ the distribution system}  
Optionally , a pressure sensor may be placed on the output side of the pump to provide an indication of { HEAD ~ an empty reservoir } or a substantial blockage in { TAIL ~ the distribution system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH