Is this a proper installation? If you notice, they didn’t install a “drip leg” for this water heater. There are drip legs on two other furnaces and another water heater in this house, but the only difference is those fixtures are supplied by iron pipe, as you could see this is flexible supply line.
It’s natural gas
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It should have what the code calls a "sediment trap", not a drip leg. They are actually built the same, but the proper term describes what the true purpose is: it's to catch sediment or crud that might otherwise enter the WH's control valve and hold the valve in the open postion, thereby causing the WH to fire continuously, which is dangerous.
"Drip legs" used to be needed when gas contained water as a by-product of the gasification of coal or of poorly-processed natural gas.
There is only one right way to build a sediment trap, and that way will be shown as a diagram in the instruction booklet that came with your water heater.
Green
See any green stickers on that job?
No inspection.
Around here if you buy a WH from any local scource you get a notice from the Health Dept telling you what day they will be there to inspect. It use to be that a home owner could buy and install a WH and never have it inspected. Now all wholesale and retail suppliers are required to report WH sales to the HD plumbing inspectors. You can't buy one without a valid identification and the address of the installation.
That kinda po'ed a lot of people for a while, but it sure reduced the number of CO deaths and things that went "boom".
Thanks for all the feedback guys, I didn't think it was right which is why I posted it.