Iwo manifold anoreva chishandiso chinoshandiswa kubatanidza kudziya kwekudziya mvura yekuisa pombi uye kudzoka pombi mune yeiyo fl out yekupisa system. Iyo yakakamurwa kuita zvikamu zviviri: kupatsanurwa kwemvura nemuteresi wemvura. Iyo yekuparadzanisa kwemvura ndeye mudziyo wekuparadzira kwemvura unoshandiswa kubatanidza pombi dzemvura dzevarapiro akasiyana siyana ekudziya akasiyana muhurongwa hwemvura.