Some guy decided to install a 5" stack diverter for a boiler setup atop a 4" exhaust flue on a furnace. The limit inside the diverter is unwired to anything in the furnace essentially bypassing any spill switch safety device. The flue from the 4" furnace exhaust goes to 5" then connects to a tee and goes back to 4" before leaving the tee on the other side to 6". Needless to say the 2 year old furnace has enough corrosion to look 15 years old. oh and the crimps are in the wrong direction passed the tee. Classic!
