Well I got my humidifier water line moved to make way for the cabinet I am building. To make everything fit, I need the top of the cabinet to be about four inches from the ceiling. I pushed the vent pipe up into the attic about 5 inches. In this picture, the bottom of the pipe was 7" from the ceiling.
VentPipe.jpg
Our heating contractor told me once this pipe was just a safety measure to prevent gas buildup should there ever be a leak. Does anyone know if there is a building code rule that specifies how far this pipe must extend down? I thought about removing it and putting a piece of 1/4" hardware cloth in the opening but was not sure if that was a good idea or against building code.
Thoughts please...
...Thanks