Are you doing the bending with the charcoal?All humor aside ... I disagree with Iwire.
Code only says bending equipment must be 'identified.' It says nothing about listing, labeling, approvals, certifications, manufacture, or that the thing must be store-bought.
I'd love to see which section any inspector would cite. NEC does not define 'identified.' All I need do is write 'pipe bender' on it. About all he could say was that using a Sharpie might not be 'durable' or 'legible' enough, and ask for a nicer ("clearer") identification.
Heck, there's nothing to keep Iwire from letting me sell him one. Gee willikers, now the thing is "commercially manufacturered for the purpose."
Side note ... charcoal as the heat source ... try it some time- you just might like it! Nice, even heat, no 'warm-up' once you get it going, great for the first bend, as well as any fine adjustments.
Second side note ... bring some burgers ... every wise guy will see the thing and ask about lunch .... come lunch time you can grill yours in fron of them. Payback, you know.
We went through the heating vs. bending thing a while back and I don't think we came to a solid conclusion.
The code says bending. I don't see anything there that tells us how we have to heat the pipe before we bend it.
Are your hands identified for use as a bender?
If the NEC means to say that the means to heat plastic pipe shall be done with a device identified for the purpose, why don't they say it?
FWIW, a heat gun made for paint stripping works great for heating PVC, at least the small stuff. Also, if you just have to use a torch and manage to brown up a few spots, automotive primer will hide them perfectly.