Isihluzi sokucoca luhlobo lwezixhobo zokucoca amanzi ezisebenzisa isikrini sokucoca ukuthintela ngokuthe ngqo ukungcola emanzini, ukususa izinto ezimisiweyo kunye ne-particle, ukunciphisa i-turbidity, ukuhlambulula umgangatho wamanzi, ukunciphisa ukungcola kwenkqubo, ibhaktheriya kunye ne-algae, i-rust, njl. , ukwenzela ukuhlambulula umgangatho wamanzi kunye nokukhusela umsebenzi oqhelekileyo wezinye izixhobo kwinkqubo.Inomsebenzi wokucoca amanzi aluhlaza kunye nokucoca ngokuzenzekelayo kunye nokukhupha into yokucoca, kunye nenkqubo yokunikezelwa kwamanzi engaphazamisekiyo inokubeka iliso kwisimo sokusebenza sokucoca, kunye neqondo eliphezulu lokuzenzekelayo.