Plumbing Venting

Good reference:

Vent to drain distances included. Island venting. Air admittance valves. Engineered vent with sump pump and air admittance - like under sink macerator pump.

https://wabo.memberclicks.net/assets/pdfs/Plumbing_Venting_Brochure_2018.pdf

Data

• Vent exends 6" above roof, except if roof is used for purposes other than weather protection - in which case it's 7'. [1]