Our local AHJ is requiring that we pipe the emergency vents of a 150
gallon UL 142 fuel tank outside. I have two questions.

Are the vents required by code or standard to be piped outside?

If we pipe them outside how do we calculate the added pipe and fittings
to be sure the vent will still operate properly?

Thanks for your help.

Ron Fletcher
Aero Automatic Sprinkler
Phoenix, AZ 85024
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