1. Ukucindezela okuqhubekayo kwesistimu, njengokushoda kwamanzi kwesistimu, okungukuthi, lapho ukucindezela kuncishisiwe, ithangi lokunweba lizozithela ngokuzenzakalelayo ohlelweni, ngokuphambene nalokho, uma ingcindezi yesistimu ikhula, ithangi lokunweba lingakwazi ukuqeda ngokuzenzakalelayo amanzi amaningi kuze kube yilapho ingcindezi ilinganisela.
2. Khipha umoya ohlelweni.