The function of a save all is to remove fiber fines and other solids from white water.

The clarified white water can then be used for showers, for stock dilution, and for make down of certain types of chemical product.

Also it can be stored with a much-reduced chance of materials becoming settled as deposits. Clarified white water from save all also may be discharged to waste water treatment, minimizing the loss of solids from the process.

The most widely used types of save alls use disk screens or drum screens. Some long long fiber or broke usually is added to aid in the filtration of fines.

Dissolved air floatation equipment is also used for floatation save alls in many mills.

Such processes are designed so that fiber fines and other solids rise to the top of a shallow chest where they can be skimmed off and recovered.