RO expands to ‘Reverse Osmosis’. It is one of the most basic water purification stages, which is commonly associated with budget water purifiers. Aquafresh RO System has a wide array of options and the price tag is extremely affordable too. Apart from Reverse Osmosis, one can also get multiple levels of filtration like UF, UF, TDS, etc., in a sub-Rs 10,000 price bracket. The RO system is very suited for domestic usage purpose and is usually between the size of 8-15 liters.