Speaking of peeves.
The gas company replaced all gas lines a while back, and before they turned the gas back on they inspected my furnace and water heater. I was gigged for not have a water sump, a tee, in the gas line going to the WH. I promised I'd fix it and they turned the gas on anyway.
So I thought to myself, why is that a problem? Obviously at one time it must have been, hence the code. But why don't WH manufacturers make gas burners and pilot lights that can get digest any water in the line and continue to operate?
Turns out they have solved the problem. I looked up my WH model installation instructions and they neither specify nor recommend a tee. There is one line in the instructions that says if code requires it then you should put one in. I was all set to add the fittings this summer but have decided to shelf them until the next WH replacement.