Give yourself some room to work with the Tapcooler extension tube. Not every draft setup is located at a convenient height or location to counter pressure fill your bottles. With the optional extension tube, you can set up your bottling run up to 6.5 feet away from your beer faucet. One end of the connection hose screws into the top of the filler unit and the other end of the tube is screws into the filler unit's removable tap nozzle insert. Includes two small o-rings to seal the extension line on either end.