Hot water disinfection is currently the more internationally respected method of disinfecting water treatment systems. There are two types of hot water disinfection water treatment systems, one is only hot water disinfection of reverse osmosis water circulation piping, and the piping must also be made of heat-resistant PVDF, PEX or stainless steel pipe and other materials. Another hot water disinfection is able to reverse osmosis membrane and reverse osmosis water circulation pipeline all hot water disinfection. The hot water disinfection function is often configured by the water treatment system itself and is simpler to operate, so it can be operated frequently. In addition, hot water disinfection only heats the water, there are no chemicals, no residual problems, high safety, and no harm to patients or operators. The hot water disinfection system is usually set up on the water treatment system with a water heating system that can be automatically controlled. During disinfection, the heating system automatically heats the water to 85-90 degrees Celsius. At the same time the hot water is circulated to the entire water treatment system to achieve the purpose of disinfection. It should be noted that water treatment systems capable of hot water disinfection are different from ordinary water treatment systems, mainly because the connection materials of the reverse osmosis membrane, piping, valves and other parts that need to be heated need to use special materials, and the assembly requirements are also more stringent. If the water treatment system can be disinfected by hot water of reverse osmosis membrane, it is required to be able to resist high temperature of reverse osmosis membrane. Hot water disinfection has many advantages over chemical disinfection: first of all, there is no risk of disinfectant residue; at the same time, it saves a lot of reverse osmosis water used to flush the disinfectant; and the disinfection process can be carried out automatically, without the need for personnel to keep watch. However, it is important to note that the effectiveness of hot water disinfection systems is determined by the heating temperature and heating rate, and once the temperature and heating rate do not meet the disinfection requirements, the disinfection effect will be greatly reduced. Hot water disinfection does not remove biofilm that has been generated, but the simplicity of hot water disinfection, which can be done frequently, can prevent the generation of biofilm. In addition, although hot water disinfection systems do not consume chemical disinfectants and the cost per disinfection is not high, the high cost of the equipment and the lack of awareness of the importance of water treatment systems in the overall dialysis equipment have limited the popularity of hot water disinfection in China.