Isetyenziswa kakhulu kwimibhobho yokucoca ioyile okanye olunye ulwelo, izindlu zentsimbi yekhabhoni kunye nebhaskithi yentsimbi engenasici. Umsebenzi oyintloko wezixhobo kukususa iinqununu ezinkulu (i-filtration coarse), ukucoca ulwelo, nokukhusela izixhobo ezibalulekileyo.
Izihluzo zebhaskithi ezi-2 zidityaniswe ngeevalvu.
Ngelixa esinye isihluzi sisetyenziswa, enye inokuyekwa ukucocwa, ngokuphendululekileyo.
Olu luyilo lulungiselelwe ngokukodwa izicelo ezifuna ukuhluzwa okuqhubekayo.
Izinto zebakala lokutya, isakhiwo silula, kulula ukuyifaka, ukusebenza, ukuqhaqha kunye nokugcina. Iinxalenye zokunxiba ngaphantsi, iindleko eziphantsi zokusebenza kunye nokugcinwa.