The Rain Wizard Connector Kit is your tool for expanding the capacity of your Rain Wizard collection system. Simply connect each end of the hose to each barrel per the instructions. When the primary barrel is full, it will overflow into the next rain barrel. Setup is quick and just requires a screwdriver for the clamps and a drill with a 1/4"-3/8" bit. When positioning the rain barrels be sure to have the primary barrel level with, if not higher than, the secondary barrel(s). This ensures that water will flow out through the connector hose and into the second barrel. The higher the first barrel than the second, the more water pressure into the second barrel and reduced waste in overflow.