In my jurisdiction, a waste drain vent pipe must terminate 6" above the roof (or another vertical surface if it's not sloped). Is this typically measured on the ridge side or the eave side? For a 4" vent (like mine), it would mean a difference of about 2.5" on my 7/12 roof.
Plumbing – How is a waste drain vent pipe vertical clearance measured
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Best Answer
It's measured on the high side (the nearest point or the shortest dimension).
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