I have 2" vent in my house that drains almost to main drain pipe very low in
basement and goes to the roof through 2 floors. Currently several fixtures
on first floor bathroom and kitchen sink (also from first floor) are not
vented at all. There are two vents going through the roof: main stack vent
and this 2" vent. I installed sewage ejector in my basement and want to vent
it through 2" vent, I also want to vent through this vent all other first
floor fixtures that are not vented now. Can I do this? I know that
individual vents must connect to main stack vent at least 6" above highest
fixture flood level. Does this requirement apply to my 2" vent? It is only
vent, nothing drains to it. I also don't know if any fixture from second
floor bathroom is vented through it.
I don't see any problem with what you propose.
Doubt that you will be exceeding the maximum number of fixture units
allowed on a 2" vent.
If the kitchen drain isn't causing any problems now (gurgling,
self-siphoning), I wouldn't spend a lot of effort venting it;
it was commonly allowable practice in the past to use an oversize
drain which would then act as its own "vent" for kitchen drains.
I would still want to vent all fixtures following the code. My main concern
is "at least 6" above flood level" rule. I don't know if any of second floor
bathroom fixtures are vented through this 2" vent and I will be connecting
all vents from basement and first floor fixtures to the vent in first floor
thus below flood level of second floor fixtures. I don't understand if this
"flood level" requirement applies to my situation since I actually do not
connect anything to main stack vent but to dedicated vent that goes through
entire house from basement to the roof.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.