Inkcazo yesakhiwo: Uyilo lwesikwere lusetyenziswa kakhulu, umngxuma omkhulu we-drain ububanzi unyusa i-drainage. Intsimbi engatyiwayo iyakwazi ukudleka kwaye iyamelana nomhlwa ukomelela nokomelela.

Gcina ucocekile: I-drain yomgangatho ingagcina igumbi lomile kwaye aliqokeleli amanzi. Ukuthintela kabini ngokufanelekileyo kuthintela ukuvala. Ilungele igumbi lokuhlambela, ikhitshi, igaraji, kunye nayo yonke indawo yoluntu.

Ufakelo olulula: Isivalo esisuswayo kunye nesihluzi kulula ukusiphakamisa ukuze kufakwe kunye nokucoca.