Most aesthetic laser and IPL machines use water to cool the system. The water pump pumps this water throughout the components of the machine which require cooling, such as the laser head, the flash lamp, the rod, the flow tubes and more to prevent overheating. The DI water filtration process helps ensure the water is clean and will leave minimal residue in your aesthetic laser and IPL equipment, and avoid positively charged ions from burning your machine, and helping keep your equipment in good running condition.