To prevent fattening of plastic pipe, what practical material can be used when bending it?

Using sand as a practical material when bending plastic pipe is effective because it helps maintain the shape and integrity of the pipe during the bending process. When plastic pipes are heated and bent, they can easily deform or fatten, which leads to weak points that may compromise their functionality. Filling the pipe with sand prevents this from happening by providing structural support, distributing heat evenly, and allowing for a smoother bend without the risk of kinking or flattening the pipe.

Moreover, sand is a readily available and cost-effective option, making it suitable for both small-scale and larger projects. The granular nature of sand fills the entire pipe uniformly while allowing for the heat to be absorbed efficiently, which is crucial during the bending process. This method is used commonly in plumbing and piping applications to ensure that the final product retains its intended diameter and strength.