The Fastcon set for Rototec above-ground rainwater tanks consists of a 1" female thread x male thread ball valve, 1" screw, 1" male thread x 25 m hose end (2 pieces), 25 mm reinforced hose (0.5 m length), hose clamp (2 pieces). Allows tanks to be connected to each other in a battery operated manner. Schemes of the battery connection of tanks can be found in the attachments.