When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
Use the circle template to determine what angle the spout will need to be cut at and trace a line.
Cool! flattened balls pressed into a mold. other possibilities. . .
PVC Half Pipe Slump and Hump Mold for Handbuilding With Clay
Admittedly, this has nothing to do with the skater's version of a half pipe, it's about taking a big PVC pipe and cutting it in half to drape clay over it or in it....