Venting through soil stack?

Depending on many restrictions, yes.... you could have "wet venting" where the main soil stack acts as a vent also.

Operative here is many restrictions in the configuration... trap arm lengths/sizing, single floor etc etc.

Would need to know your exact layout to know if it even possible.... it does seem unlikely that the entire house (multi bath rooms and kitchen/washer.... etc could all be wet vented.....

Get up on the roof and determine your main vent and other vents.....


EDIT: Studor AAV venting is also a possibility depending on your jurisdiction.... although I think most jurisdictions that allow them, also require them to be accesable.... so you ought to be able to get to them or see them.

(Caveat.... I'm a GC not a plumber. If I do minor plumbing myself, I have to pull out my books and review anything but simple venting.)

Of course venting may be tied into other dry vents and projections thru the roof can be minimized.

SectorSecurity said:

I am thinking the main stack goes into the attic and has a valve on it and they figured because the attic is vented through a wind turbine no need to go through the roof with the pipe. Will have to get out the ladder and pop my head into the attic and see what is up there.

Click to expand...

Interesting.... never seen/heard of a studor main stack vent...

Anyone know about that assembly?????????