(OPTIONAL) Connection Kit, 13 Pieces 3/4" Male Thread Designed for the rainwater supply and drainage system collected in the tank, this complete and universal set ensures quick and easy assembly. The kit includes an external filter that purifies the water entering the tank. Contents of the 13-Piece Connection Kit ICANS7: Hole saw for tank and gutter Tap Universal connections Garden hose: length 140 cm, diameter 15 mm Spout Hanger Reducer Hose connecting the tank with the gutter: length 60 cm, diameter 25 mm External water filter Gutter water collector Connector color: black