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