I-manifold isho insiza esetshenziselwa ukuxhuma ipayipi eliyisisekelo eliphakeme lokushisa kanye nepayipi lokubuya ohlelweni lokushisa lwe-FL Oor. Ihlukaniswe izingxenye ezimbili: Isihlukanisi samanzi kanye nomqoqi wamanzi. Isihlukanisi samanzi yithuluzi lokusabalalisa amanzi elisetshenziselwa ukuxhuma amapayipi okuhlinzeka ngamanzi amapayipi ahlukahlukene okushisa ohlelweni lwamanzi.