Maximize the quality of your rainwater with our First Flush Key Components Kit, designed specifically for rainwater harvesting systems. This essential kit ensures that the initial runoff from your roof, which often contains debris and contaminants, is diverted away from your storage tank, allowing only cleaner water to enter. The First flush contractor kit includes the key components for filtration of your Bushman rainwater harvesting tanks. Includes first flush filters, float ball, downspout shim, debris separator, mounting screws, and mounting brackets.