{HEAD ~ The bottom} of 5 micron filter 74 is connected through normally closed valve 132 in {TAIL ~ line} 134 back to the chlorinator chamber 
{ HEAD ~ The bottom } of 5 micron filter 74 is connected through normally closed valve 132 in { TAIL ~ line } 134 back to the chlorinator chamber
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH