4. Emva kokuba ukufakwa kugqityiwe, vavanya itanki yamanzi, uyigcwalise ngamanzi, khangela ukuba kukho ukuvuza kwamanzi, khangela ukuba inkqubo yokukhupha i-drainage ilungile, ingaba kukho ukuvuza kwamanzi, ukuchithwa kwamanzi kunye nezinye iingxaki, kwaye