its just stupid politics at its very best....
In one state you have to upgrade the flue to 4", in another you can still use 3" on like a 50 gallon gas. Does anybody know why there's this difference?[/quote]
IAround here we can use 3 inch on a water heater except
for any type of city jobs around here. They force us to increase the size to
4 inch....on a standard heater....which means running
a new chimmney however far to make the inspectors happy
the stupid thing about it is the open hood vent on most
all water heaters reduce the size of the chimmney to 3 inch
right from the start at the flu hood.......
so basically.. you have restricted the vent right to 3
inch from the start
you could not run 4 inch from something and
reduce it down to three going into a chimmney,
they would jump up and down about that.
I hope that some inspector never realizes this
and tries to make everyone get larger hood vents for the
heaters to " pass code.." ..
they will argue that fumes could escape
out the bottom of the hood vent which is about 6 inch
before getting into the 4 inch pipe.
I dont think that they make them..or ever have.