It depends on the severity of the leakage. If the leakage is major, replacing the drain hose is best. However, for a minor leakage, a simple splice should be able to solve the problem. To splice a leaking pipe, cut a rubber hose big enough to cover the holes. Align the rubber piece on the damaged part and poke holes in each end. Pass a flexible wire through the holes and tie it around the main pipe to secure the rubber piece—test for leakages.