P.B.W. (Powder Brewery Wash) – P.B.W. is a percarbonate that is the highest strength of the Percarbonates listed. This is my favorite cleaner of all, since it is very effective in dissolving stubborn stains in hard to reach places. It works well to clean hoses, airlocks, fermenters, all plastic and all metals, with a 30-minute soak. P.B.W. works well to clean the interior of your Cornie kegs. P.B.W. works well in hot, warm and cool water. For stubborn stains, an overnight soak is necessary. The solution can be used for more than one piece of equipment. A normal dosage is 1 tablespoon per gallon. Heavy duty cleaning can be up to 2 tablespoons per gallon. Rinse twice with warm water after using.
PBW is commonly used as a clean-in-place (CIP) chemical in commercial breweries where it is difficult to gain access to the surface the brewer is cleaning.