I make structures from used 1" black plastic well pipe that the crooks* running a well drilling business throw away every week. I drive past them on the way to/from work each day.

*Repairs on wells they drilled in the subdivision next door show that the wells there are only half as deep as what the crooks charged for. I suspect they throw away the pipe on every well they rework; I've pulled and replaced various pumps three times over the years and always managed to reuse the same black plastic pipe.

P.S. It's fun being a cranky old man.