Hey, Gary; yes, it was. But the presentation got in the way. Not your fault; thanks for bringing this info up!
I had questions that were never answered basically because the presenter hadn't gone to the effort of doing a production script.
I'm really happy to have been exposed to the concepts, but...
He was using schedule 40, I think, and the white pipe usually fits most DC fittings, but not always the flex hoses. They seem to have their own definition of 4" diam., anything between 3 1/2" and 4 1/2". I see where the idea is useful, and it could have been presented better. I like short and sweet myself.
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