An autoclave is a machine that is commonly used within veterinary practices to clean equipment via the use of high pressure, sterilised steam. Due to the boiling temperatures that water is heated to, the autoclave is prone to particle and mineral build up within the machine. This is more commonly known as scale, and it can reduce the service life of the autoclave. More importantly, scale leads to malfunctions and the improper sterilisation of equipment, resulting in cross contamination.
To purify the water to this level and ensure no scale build up, particulates and organics need to be removed from the water before the reverse osmosis stage. This will further the filtration by removing ~99% of bacteria, ions and dissolved solids from the water. A final polishing stage removes all remaining salts and ions using deionisation resin.