Abstract: A device for repairing drainage pipes includes a flexible tube with a first open end, a second open end, and a hollow interior extending between the first and second ends. A cover member is attached to the first end of the tube and a ball is releasably attached to the second end. The cover member has a central opening that is aligned with the hollow interior. The cover member can be disposed on the pipe rim, outside of the pipe, and the ball can be inserted into the pipe opening. As the ball travels through the pipe, the tube unfolds to cover the peripheral wall of the pipe. Thus, the tube of the device can cover an interior surface of the pipe.