Umzimba wokukhupha amanzi wenziwe yi-screw axis ene-fixing and moving plates ezihambelanayo, njengoko ububanzi bangaphakathi be-screw axis bukhulu kune-moving plate, i-moving plate yenza intshukumo ejikelezayo nge-screw axis ukuthintela ukuvaleka. Isithuba esiphakathi kwee-fixing and moving plates siba sincinci ngakumbi kwicala lokukhupha udaka. Emva koxinzelelo lomxhuzulane, udaka luthuthwa luye kwiindawo zokuphelelwa ngamanzi, lukhupha amanzi phantsi koxinzelelo lwangaphakathi lwe-outlet back plate.