-Reverse osmosis- The process of reverse osmosis has been used to purify water for both domestic and commercial purposes since the early 1970s. The process uses a membrane which only water can pass through, purifying salts and other particles from the fresh water. Reverse osmosis systems, for both home and commercial use, can be bought in Australia through companies like PSI Filters. -Water filters- Water filters and purifiers are becoming increasingly popular as people are thinking more about their health and the environment. Water filters are available for both domestic and commercial use, and by looking at the range available on the internet you can find filters for any need and budget. In Australia, sites such as psifilters.com.au stock an expansive range of water filters and purifiers. -Water filter- A water filter can purify water for both drinking and domestic use (for example, shower filters). In Australia, sites such as psifilters.com.au stock an expansive range of water filters and purifiers. A water filter can be fitted for both domestic and commercial use, and by looking at the range available on the internet you can find a filter for any need and budget. -Water purifier- A water purifier can filter water for both drinking and domestic use (for example, shower filters). In Australia, sites such as psifilters.com.au stock an expansive range of water purifiers and filters. A water purifier can be fitted for both domestic and commercial use, and by looking at the range available on the internet you can find a purifier for any need and budget.