Distilled water is water that has been boiled into vapor and condensed back into liquid in a separate container. Impurities in the original water that do not boil below or near the boiling point of water remain in the original container. Thus, distilled water is a type of purified water.
Bottle for distilled water in the Real Farmacia in Madrid
A boiling water distiller. Boiling tank on top and holding tank on the bottom.
Typical laboratory distillation unit
Purified water is water that has been mechanically filtered or processed to remove impurities and make it suitable for use. Distilled water was, formerly, the most common form of purified water, but, in recent years, water is more frequently purified by other processes including capacitive deionization, reverse osmosis, carbon filtering, microfiltration, ultrafiltration, ultraviolet oxidation, or electrodeionization. Combinations of a number of these processes have come into use to produce ultrapure water of such high purity that its trace contaminants are measured in parts per billion (ppb) or parts per trillion (ppt).
Bottle for distilled water in the Royal Academy of Pharmacy (Spain)
Large cation/anion ion exchangers used in demineralization of boiler feedwater.
Distribution station for "Osmosis water" aimed at window cleaners