B VENT Install For Water Heater

[Mitch Sutherland]

I am installing a 3 inch B vent for a water heater. I am 31 inches from the ridge vent. I have a 5-12 roof pitch. I read the code stating must be 2 feet taller than any 10 foot horizontal structure. Does this include the roof? To be 2 feet taller than the ridge vent/peak I would be nearly 3.5 foot in the air with the B vent. Is there another code I am missing thank you! Any help would be appreciated!

 

[Tuttles Revenge]

Not sure what code you are under but... UPC table 509.6.2 incidates with 6/12 or under with listed pipe and listed cap. Should extend minimum 12" from the highest portion of the roof where its penetrating to the lowest portion of the discharge opening.