A pure water machine is a device that can filter tap water into pure water. According to usage, it can be divided into several categories: household pure water machines, laboratory pure water machines (also known as ultra pure water machines), and industrial pure water machines. The pure water machine adopts pre-treatment, reverse osmosis technology, ultra purification treatment, and post-treatment methods to almost completely remove the conductive medium in the water, and also remove the non dissociative colloidal substances, gases, and organic matter in the water to a very low degree. Remove floating debris, heavy metals, bacteria, viruses, etc. from water through multi-level filtration.