Ukuba uphupha usela amanzi, ngokubanzi unethamsanqa ukuba iglasi igcwele kwaye amanzi acocekile. Ukuba amanzi anodaka okanye iglasi imdaka okanye yaphukile, kungekudala ungaphulukana nento ebalulekileyo, okanye umntu omaziyo uya kukucela uncedo.
Ukuba uphupha usela amanzi, ngokubanzi unethamsanqa ukuba iglasi igcwele kwaye amanzi acocekile. Ukuba amanzi anodaka okanye iglasi imdaka okanye yaphukile, kungekudala ungaphulukana nento ebalulekileyo, okanye umntu omaziyo uya kukucela uncedo.