Combining vents from different stacks

[TCor]

Is it acceptable to combine vents from
different soil stacks as long as it’s done above flood level rim and meets the requirements for vent sizing? I’m remodeling and trying to minimize the number of roof penetrations.

 

[Cacher_Chick]

Yes, as long as the pitch is maintained so that all parts of the system can fully drain rainwater & condensation, it is not an issue.

 

[Sponsor]

 

[hj]

You also have to consider the size of that single roof penetration. Usually its AREA, not combined diameters, has to equal the size of the incoming sewer line.

 

[TCor]

Yes, as long as the pitch is maintained so that all parts of the system can fully drain rainwater & condensation, it is not an issue.

Thanks!