Distilled water is Water in one of its purest forms. It’s your usual water but with the minerals and impurities removed. The process of producing distilled water is almost like the natural water cycle, which involves water evaporating and becoming a gas, rising to form clouds, which then cool and condense to rain back down on us. The distilled water is used for Tubular Battery Service. Tubular batteries for inverters are becoming very popular and this type of batteries require periodic topping with distilled water, been the purest form of water to avoid any kind of chemical reaction with the electrolyte (Acid) in the batteries.