The roof top water drain pipes (down flow pipes) to be joined together and connected to the inlet of rainy filter. When the rainwater flows by gravity through the INLET OF FILTER and entering the UPPER HOUSING, it allows the rain water to flow into the SS-304 FILTER ELEMENT in angular motion at specific velocity , which creates COHESIVE FORCE and segregates dirt particles and clean water individually, thereby dirt particles and waste materials are flushed out through the DRAIN OUTLET, while the clean rain water passes through CLEAN WATER OUTLET and gets into the sump, tank, well, bore well or re-charging well etc.