According to reports, in traditional household water dispensers, water is heated by an internal hot water tank. It is precisely this inner tank that highlights the hazards of traditional water dispensers:
Prolonged boiling creates "re-boiled water": When drinking water is repeatedly heated in the hot water tank, it becomes "re-boiled water." This type of water contains harmful substances such as heavy metals and arsenic compounds, and long-term consumption can harm gastrointestinal health.
Scale becomes an "additive": According to reports from national environmental testing departments, if the inner tank of a traditional water dispenser is not cleaned for more than 3 months, it will breed large amounts of bacteria, residue, and even bloodworms. These adhere to the inner wall of the hot water tank, becoming a toxic "additive." After these substances enter the human body, they can cause diseases of the digestive, nervous, urinary, and hematopoietic systems.
The hot water tank produces "nitrates": The hot water tank is mostly made of stainless steel and aluminum shells. Tests have shown that under prolonged heating, the nitrite content in water containing iron, aluminum, and ammonium will significantly increase, and nitrites are well-known carcinogens.