said second timer being adapted to respond to {TAIL ~ the establishment} of the commencement of each system on {HEAD ~ time} to establish a period during which said pump is energized; and 
said second timer being adapted to respond to { TAIL ~ the establishment } of the commencement of each system on { HEAD ~ time } to establish a period during which said pump is energized ; and
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH