Domestic RO (reverse osmosis) system is a type of water filtration system that uses a semi-permeable membrane to remove impurities and contaminants from tap water. The system typically consists of a pre-filter, reverse osmosis membrane, and post-filter, which work together to purify the water. The pre-filter removes larger particles such as sediment and chlorine, while the reverse osmosis membrane removes dissolved minerals, heavy metals, and other impurities. The post-filter is a carbon filter that removes any remaining contaminants and improves the taste of the water. The purified water is stored in a tank and dispensed through a faucet. Domestic RO systems are commonly used in homes and are typically installed under the sink. Some models may also include additional features such as a UV lamp to kill bacteria, a mineral cartridge to add beneficial minerals to the water, and a leak detector to prevent water damage. It is important to follow the manufacturer's instructions for proper installation, use, and maintenance of the domestic RO system to ensure its longevity and effectiveness in providing safe and clean drinking water.