Nchakwenelera kuti maji ghanyamure, kuzungulira, na kufinyikizga maji ghakutowa ghakotcha na ghakuzizima, ndiposo maji ghakufewa. Nchakwenelera kugwiliskira nchito na maji gha alkaline pachoko, maji ghambura mineral, maji ghakupangika na distilled, maji gha mu chiziŵa cha kusambiramo, na chloride-ghakuŵa na maji apo kutentha kwa maji kukukhumbikwira kuchepeskeka.
