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Important: If it is necessary to cut the copper tube, the end must be chamfered free of burrs to prevent cutting or nicking O-ring inside the spout. Slide spout over copper tube flush with the finished tub or wall surface. Tighten set screw (2), but do not overtighten. B-1 1 2 Iron Pipe Installation Install threaded pipe nipple (1) to extend past finished wall. Apply Teflon® tape to threads on pipe nipple and screw on tub spout. B-2 1 Copper Sweat Installation Remove O-ring (1) from adapter (2).