Isifudumezi esizimeleyo solwelo sedizili sokupaka sifudumeza isipholile se-injini kwaye sijikeleza kumjikelo wamanzi wesithuthi ngempompo yokujikeleza ngenkani, ngaloo ndlela siphumeza ukunyibilika, ukuqhuba okukhuselekileyo, ukufudumeza kwekhabhinethi, ukufudumeza i-injini kwangaphambili kunye nokunciphisa ukuguga nokukrazuka.