Abstract: Bathtub or shower stall liner vacuum forming system for the forming of a liner to be positioned over an existing bathtub comprises a bathtub liner vacuum machine, a plumbing apparatus and a lift for moving the plumbing apparatus. The bathtub liner vacuum machine comprises a frame member, a track member, an oven and a skirt forming member. The plumbing apparatus includes a conventional plumbing fixture, a manifold, mesh member and a vacuum pump. Upon positioning of the formable member within the frame member and skirt forming member, the frame member is rolled along the track member into the oven. When the formable member is heated to the desired temperature, the bathtub is positioned into contact with the formable member and the air trapped therebetween is removed with the aid of the vacuum pump. As the air is evacuated, the formable member takes on the configuration of the conventional plumbing apparatus and mesh member. The invention further includes a method for forming a bathtub liner.