I am sure the plumber put it at that height for the inspector.
Hight of vent pipe above roof park county colorado.
Where a roof is to be used for any purpose other than weather protection the vent extensions shall be run at least seven feet above the roof.
2 0 feet above the roof surface.
Roof pitch rise run in inches.
1 0 foot above the roof surface 1 7 12 to 8 12.
Table of rooftop chimney clearances for metal b vent chimneys flues.
Extension of vent pipes through a roof shall be terminated not less than 12 inches above it.
2 5 feet above the roof surface.
1 5 feet above the roof surface.
Illustrations of proper gas fired water heater venting using type b double wall vent pipe through a roof above or through a chimney below include details for the flue vent connector such as the requirement of a minimum vent connector upwards slope of 1 4 per foot of horizontal run.
Permits initiated before february 1 will stay under 2015 code requirements.
You must also consider the snow line so the pipe does not get covered.
Dubldare mn mn 4715 2530 subpart 1.
Open vent pipes that extend through a roof shall be terminated at least 6 inches 152 mm above the roof or 6 inches 152 mm above the anticipated snow accumulation whichever is greater except that where a roof is to be used for any purpose other than weather protection the vent extension shall be run at least 7 feet 2134.
For the next example you have a shorter chimney height.
A vent terminal and depending if the roof is strictly for weather protection it terminates about 24 above the roof.
If the previous calculation results in the required height of 64 inches we can see that the top of the pipe will not rise above the roof peak but would still meet the requirements of the rule.
For 18 feet of run you would have a rise of 72 inches.
The vent is supposed to be 10 away or 2 above any window.
P3103 1 roof extension.
Vent hight above roof cold climate.
A connection between a vent pipe and a vent stack or stack vent shall be made at not less than 6 inches 152 mm above the flood level rim of the highest fixture served by the vent.
The 2018 international residential building plumbing mechanical fuel gas energy conservation existing building and property maintenance codes as amended by larimer county take effect for all permits initiated on or after february 1 2019.
Horizontal vent pipes forming branch vents relief vents or loop vents shall be located not less than 6 inches 152 mm above the flood level rim of the highest.
If the roof area is for people then it is 7 ft above the roofing surface.
From the irc and other plumbing codes.