That sure looks like white schedule 40 to me and since the caption reference a plumber I have to go with white. But anyway it's only a joke.OK I understand the confusion. That is not PVC water pipe. Which is white. (Which I would not use for water anyway.) Rather, it is U.V. resistant gray electrical conduit for pulling 12 AWG THHN Solid Building Wire to carry primarily AC current. I like it. It lubes up really well and you can pull relatively long lengths of multiple conductors (wires) for long distances. See below:
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