Abstract: A knockdown type bathing enclosure is disclosed. It can be manufactured as a one-piece plumbing fixture, cut into portions for transportation, and assembled at the installation site. The bathing enclosure has a joining strip attached to an external side of a wall structure. The joining strip has an attachment surface for abutting the wall structure, and an outer tubular bulge. The joining strip and the wall structure are cut into portions along a plane passing through the tubular bulge. A plurality of locator members are then inserted into an internal slot formed in each portion of the cut tubular bulge. Guided into proper alignment by the locator members, the cut portions are then fastened together using a clamp member.