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