The three household water "security guards"

Household water treatment equipment according to the use of different materials, filter, using method and divided into pure water machine, pure water machine and water softeners and so on, should consider when selecting different situations and its own requirements.
Water purification machines, water purification machine without the motor and doesn't need power supply, filter by hydraulic drive, better use five or six levels of filtering technology. According to the different filter, water purification function to filter out the impurity in the water, rust, some bacteria, viruses, colloid, etc., but the heavy metals and thermonatrite effect is not obvious, so can't direct drinking water treated by pure water machine, suggest to boil before drinking.
Pure water machine, pure water machine have booster pump and the water storage tank, and need the power supply, is a manufacturer of pure water equipment. It by a certain amount of pressure to water, the water molecules and ions, state of mineral elements by reverse osmosis membrane, and dissolved in the water for the most part of inorganic salt, including heavy metals, organic compounds, such as bacteria, viruses cannot through the reverse osmosis membrane, thus make the separated purified water and concentrated water, can be directly drinking water treated by pure water machine.
Soft water machine, soft water machine by ion exchange method, when the water containing calcium and magnesium ions as you go through the resin with sodium, calcium and magnesium ions will instead of sodium ions adsorption on the resin, sodium ions flow out water softeners and become the "soft water. It can't remove the impurities in the water, bacteria, viruses and heavy metals, but can be softened water, remove the thermonatrite, water belongs to the water, the treatment can not directly drinkable.