The water purifier 3, further comprising {HEAD ~ moveable gates} to control {TAIL ~ fluid flow} from into said body of water 
to control
The water purifier 3 , further comprising { HEAD ~ moveable gates } to control { TAIL ~ fluid flow } from into said body of water
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH