Ultrapure water equipment is mainly filtered through four items: precision filter element, activated carbon filter element, reverse osmosis membrane, etc. They all have a relative life. The precision filter element and the activated carbon filter element are actually the protection of the reverse osmosis membrane. If they fail, the load of the reverse osmosis membrane will be increased and the life will be shortened. If you continue to start the machine, the quality of the pure water produced will decline, and then the load of the reverse osmosis membrane will be increased, and the life of the reverse osmosis membrane will be shortened. The final result is to increase the use cost of ultra pure water equipment.