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The invention relates to a tubing piece for tubing installed in buildings especially tube joint pieces or their components and heating element tubing pieces such as heating element curved connections or components of metal heating element t connections. The inventive tubing piece has a spout or a nipple for the connection of a plastic pipe or a plastic tube. According to the invention, the spout or the nipple is formed on to said tubing. In addition, the invention provides a method for producing a tubing piece during which said spout or nipple is made by means of a mechanical operation to form the end of the tube.