I live in southern California and have a hot water heater in a an outdoor vented galvanized steel enclosure. I've just noticed a few possible dangerous issues with this installation (see photos).
1. The exhaust vent pipe has obviously become detached at a joint (based on the lack of screw holes in the pipe it was never properly attached). Would it be possible for leaking flue gasses to fill the enclosure enough to snuff the pilot light, or even seep into my bedroom window next to the heater?
2. Even if the pipe was properly connected in the current configuration, wouldn't flue gasses flow up the sides around the crimped edges? Shouldn't the vent pipe be connected such that the crimped end is facing upward and mates into a non-crimped end above it?
3. The vent stack rises about 4 feet above the enclosure and is about 5 feet below the roof line. Shouldn't this extend above the roof line? (It appears the vent once did extend through the roof - you can see a hole in the eaves that has been roofed-over.)
Thanks for your help everyone!
Click on an image below for a more detailed view: