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