Who added the plumbing?
Every fixture should have it's own vent.
If you are adding fixtures without venting, then you will be sucking your traps dry, and pulling water from bowls.
Just had some weird experiences, added tub drain to main stack in basement. Now I have a sewer smell and flushing one of the main floor toilets partially drain the other main floor toilet? Any ideas on what may be happening.
What does that mean?
Is there a vent on the line ?
line has not been connected to tub yet right now it is just capped off, there is a vent that is installed about 16 inches from the trap that heads up and connects to the same stack about 6 feet up from drain. That drain is same line that upstairs fixtures are on.
ok's so what your saying is this is wrong, the tub drain is with in 4 feet from the stack, is the vent even nessisary? If so can it be connected to the vent from the upstairs fixtures?
Just thought of something, its been bloody cold here like -50 c. Is it possible that my roof vent is frozen causing the pressure difference that is makeing both toilets drain when on is flushed?
That is a possibility...if it has frosted closed it could cause problems.
You can disconnect and cap off the vent you installed and install an AAV on the vent in its place as long as when the bathroom is finished there is access to the AAV so it can be replaced when necessary.
Last edited by Cass; 02-01-2008 at 02:14 PM.
As Terry said, you need to vent each trap/fixture. Wrapping it into the wet vent does not make it a vent, it makes it an alternate path for the waste from upstairs. You need to run that vent line higher up into where the line is above the fixtures above on the line. Code calls for 42" above the flood plane of the fixtures above. Look at the sample Terry posted. Ultimately, all of the vents tie into the one place, but that location is high up in the structure, above those drains above it.
Important note - I'm not a pro
Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013
that was it a soft ball sized ice blockage in the vent. Bought the AAV will be installed today thanks for all your ideas.