This passes treated water from {TAIL ~ the chlorinator chamber} in the reverse direction through {HEAD ~ the 5 micron filter} and back to the chlorinator chamber 
This passes treated water from { TAIL ~ the chlorinator chamber } in the reverse direction through { HEAD ~ the 5 micron filter } and back to the chlorinator chamber
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH