Go to the vent sizing tables, Table G2428.3(1) [504.3(1)] (Jerry's note: Table G2428.3(1) is in the IRC, Table 504.3(1) is the same exact table in the Fuel Gas code, the title tells you where the IRC table is from - "G" means "gas code".)

Then the next table, and the next table, and the next, etc. - what do you see stated as the minimum connector rise height in feet?

*EVERYTHING* starts off with a 1 foot rise minimum and goes up from there.

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Jerry Peck, Construction / Litigation Consultant
Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )