E. In the rain water storage system, the volume of the water storage facility greatly influence by the water area in a region. Usually, the size of the building will limit the amount of rain water collected; and it is at this point that water storage system becomes vital . The amount of rain water collected has direct effect on the size of water storage facility .
F. Attention must be taken for building or regional rain water recycle using rain water storage system as below :
A. prevention of leaking in the rain water storage system.
B. regular checking of rain water storage system to prevent objects blocking the flow of water.
C. while designing, the height of the water tank should be lower than the centralize regional water collection centre to avoid over loading and easy operation.
D. Use lip to cover the water storage tank to prevent dirt, insects from entering. It should be strong. Alien objects should be checked at all points of entering and exiting .
3. The flow chart and management of rain water usage
The flow chart and management of rain water usage is shown below in the figure below . The intention is focus mainly on floating objects, leaves, rubbish, small particle of sand and so forth whereby filter nets and sand bed layers are setup .
4. The designing process of rain water usage
The designing of rain water usage can be divided into 4 stages . First stage, recognize the location structure and plan design. Second stage, evaluate the benefit of rain water uses which include tap water replacement percentage and rain water replacement percentage. Third stage, arrangement and planning of piping route. Finally, repair and maintenance and actual work performance.