RAINWATER STORAGE SYSTEM WITH PURIFYING DEVICE

摘要

PURPOSE: A water storing apparatus with a rainwater purifying function is provided to improve the efficiency of filtration and to reduce a cost required for maintenance by installing an air supplying pipe at the lower side of a filtering media. CONSTITUTION: A first treating part(10) primarily filters impurities contained in rainwater. A second treating part(20) is in connection with the first treating part and secondarily filters the primarily filtered rainwater by passing the primarily filtered rainwater from the lower side to the upper side of a filtering media. A treated water storing part(40) is in connection with the second treating part and receives and stores secondarily filtered rainwater if the height of the rainwater on the upper side of the filtering media is lower than or equal to a first water level. A storing part(50) stores the secondarily filtered rainwater if the height of the rainwater on the upper side of the filtering media is higher than the first water level.