Sulfur-containing water will enter the water heater. Sulfur water is harmless to people, and the characteristics of sulfur. Sulfur is an important inorganic pesticide. This commodity is yellow solid or powder, which has obvious smell and can be volatilized. Sulfur aqueous suspension is slightly acidic, insoluble in water, and reacts with alkali to generate polysulfides. When sulfur burns, it emits a blue flame, accompanied by combustion to produce sulfur dioxide gas. Sulfur is often processed into colloidal suspension for pest control. Safe for people and livestock, and not easy to cause phytotoxicity to crops.