In the UK less than 5% of tap water is currently used for cooking and drinking, with each person using less than 17.15 litres per day for 'life sustaining' purposes. This means that 95% of the water household's use is for non-potable purposes such as wat They are becoming increasingly popular with commercial and public sector businesses as it makes perfect business sense, in addition to reducing their carbon footprint.
The average household can save as much 50% of their mains water needs, by installing a domestic system. In addition, when it comes to the planning process, the installation of a rain water harvesting system can help with water related issues. By using non-chemical ultra-violet sterilisation the water can become drinkable (potable).