The burner is very rusty and especially the vertical pipe looks deeply rusted.
I have no knowledge about how this gas burner works. I am wondering whether there is a valve under the subfloor in the crawlspace? If there is a valve and the valve is not rusty, then I should be safe, right?
Should I have any gas leak concerns? It seems to me that the burner pipe is easy to replace but the vertical pipe is fixed and hard to replace.
To fix the problem should I hire a plumber or fireplace guy?