Imishini ye-Reverse osmosis iwuhlelo lokwelapha amanzi oluhlelwe ngokuzungeza ulwelwesi lwe-osmosis oluhlanekezelwe. Isistimu ye-osmosis ehlehlayo ephelele iqukethe isigaba sokwelashwa kwangaphambili, umsingathi we-osmosis reverse (isigaba sokuhlunga i-membrane), isigaba sangemuva kokwelashwa, nesigaba sokuhlanza isistimu.