Haha, I count this as a very good parallelism, as I had close connection to construction workers. Seweage pipelining can be done by multiple ways. There are ones which will clog in shorter or longer time. There are ones which made up by more parts than really needed. And there are perfectly goods which also obey all standards. Will the third one write a blog as "how to great plumbing"? Or just will say: "I know plumbing"?