Never saw this before, you?

…and how would you write it up. It goes into the wall and down to the crawl space. This is a 4 townhome unit building. single access to the crawl space with a pad lock on it.
46 50

up hill and cant see termination?

Potential narrative:

The TPR valve drop tube runs up hill and one cannot see the termination, or other things behind the wall. I recommend a qualified plumber make corrections as needed for a safe installation of same.

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Thanks Gents.

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I agree with above
Here some verbiage I use

“The water heater TPR (temperature pressure relief valve) discharge pipe has a positive slope or runs uphill. This condition can cause water to be trapped in the discharge pipe and could cause the TPR valve to fail. This TPR valve is a very important safety device. Recommend a qualified contractor for corrective repair as necessary to properly configure the discharge pipe that meets current standards.”

it always amazes me why anyone attempts to rewrite what is clearly stated in the irc & other code locations & has been discussed ad nauseam

Discharge through an air gap located in the same room as the water heater.
Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.
Discharge to the floor, to the pan serving the water heater or storage tank, to a waste receptor or to the outdoors.
Be installed to flow by gravity.
Be constructed of those materials listed in the code or materials tested, rated and approved for such use in accordance with ASME A112.4.1.

note the periods after each comment
kinda expresses zero ambiguity

ymmv

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