Acidet is an effective back flush germicide that is concentrated, high foaming and no rinse is required. It combines the strength phosphoric and DDBS acids in a formulation that sanitizes yet does not damage sensitive silicone or rubber liners.
Concentrated iodine sanitizer that also includes phosphoric and sulfuric acids is used to backflush milking units between cows. It is low foaming when used as a backflush, or when applied manually as a hard surface sanitizer.