The Rain Wizard Connector Kit enables multiple rain wizard barrels to connect together. When one barrel is full, water will flow into the rain barrel next to it. Assembly is quick and all you need is a drill with a 1/4'' - 3/8'' bit and a screwdriver for the clamps. Made for every model of the Rain Wizard, except for the Rain Wizard Rock, Rain Wizard Big Blue 55, and the Rain Wizard 300. When setting up, make sure the barrel at the down spout (primary barrel) is sitting higher than the second or third barrel, so that the water pressure is greater and there is less waste in overflow. The primary barrel ( the one that is attached to the down spout) usually is placed on cinder blocks or on a stand to have the taller height.