Stretch the hose by pulling it from each of its ends lightly to expose the tear. Do not pull so hard that you worsen the tear. Dyson hoses, like most other vacuum hoses, have ridges and grooves and are simple to stretch.
Wrap several layers of tape around the hose over the tear, ensuring that you cover the tear completely. Because Dyson hoses are made of plastic, several kinds of common tape are acceptable for this job, including duct tape, packing tape and electrical tape.
Rub the surface of the tape with your hand to work it into each of the small grooves in the Dyson hose. This process helps the tape form a quality bond with the hose.