Yes --Black pipe should be the least ...
New Buildings here in New York sometimes are built on slabs as they are in TV. I just dont see why when the pipe enters the building underground it rises to the Attic . I am sure as said before , cost is the reason.
I think it could be run along the floor through the framing between the sheetrock and outer wall and then rise only 3 feet to the appliance instead of fall from the rafters at least 7 feet down to the inlet valve .
Just my opinion --there might be some Florida codes that mandate this application..
Wont stop me from buying !!!! but maybe I might look all Electric lol
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