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