I have an old Utica Gas Boiler which will need replacing sometime this decade. I added a second story,
demolished the chimney and vented the boiler and water heater with B vent. This has been working fine for 20 years.
My problem is a low clearance in the basement where they are located. I can just get the fittings from single to double wall to fit. My" T" is facing up/down and tap is sideways to vent the W/H with the boiler coming up from underneath.
Can I reposition the "T" so that the tap it going up to the double wall and the two appliances opposing each other on the "T"? This would give me the clearance needed to replace the boiler with a larger one. Or would a "y" be required?
Also the B vent is 6" the existing boiler is 5", the old W/H was 3" but the new one should be 4", I replaced the W/H with one of the same size but kept the 3 " vent.
I can get a deal on a 4 year old Boiler, bigger than I need, but at $500 a Weil McClain it would be hard to pass up. This unit is a 6" vent. Will my 6" B vent be too small for a 3" or the 4" and a 6?
(Assuming the T opposing appliances are OK of course.)
If I cannot do either one I would settle for a smaller boiler and a 5" vent.
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