I had an oil furnace with a 6" double wall stack, looks like 8" for the outside pipe. It also carries the propane water heater 3" flue.
I replaced the oil furnace with a propane one that has a 4" flue. So now I have the 4" and 3" tee into a 6" and up the chimney.
The internal 6" pipe in the old chimney must have a hole in it as I get water dripping out when the water heater is running.
So, I'm thinking of just running a smaller pipe up though the old 6". I can get 5" pipe to 'reline' the old one but would rather use 4". So can 4" be used for both the furnace (80k btu and seldom used) and the water heater? Should I use a smaller tee where the two join together?
I replaced the oil furnace with a propane one that has a 4" flue. So now I have the 4" and 3" tee into a 6" and up the chimney.
The internal 6" pipe in the old chimney must have a hole in it as I get water dripping out when the water heater is running.
So, I'm thinking of just running a smaller pipe up though the old 6". I can get 5" pipe to 'reline' the old one but would rather use 4". So can 4" be used for both the furnace (80k btu and seldom used) and the water heater? Should I use a smaller tee where the two join together?