Memories
I once went to re-vent a power vented water tank. It had been red tagged over the weekend by another technician for multiple cracks.
It was a rental/rooming house on the wrong side of the tracks. When I got there, the tank was running. I look at the top of the tank and the basement tenant had simply removed the PVC piping by breaking it off and he put a 3' piece of 6" round duct with an elbow on the end and figured he had re-vented it himself.
He was so proud of himself, was bragging to me about how smart he is and how he is the best scrapper in town. Then he cracked his first beer of the day, at around 9am.
An to think I sometimes miss residential.