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