Scope 1, new construction, expansion and renovation of residential buildings, residential quarters, offices, hotels, restaurants, etc.; 2, schools, military units, offices, dormitories and other water-intensive applications; 3, hospitals, shopping malls, convention stadiums, public bathrooms and other public places; 4, city water pressure can not meet the fire hydrant water supply system or automatic sprinkler systems and other water requirements of the fire with water; 5, large factories, booster pump station, and other major traffic zone centralized water supply; 6, the mining industry production and living water; 7, a variety of circulating water system