"m Ransley" wrote in message
...
Now im getting a bit confused, I put in basement apatments and hooked
everything to the main 4" or so drain that takes care of 2 upper floors
and all is fine for years. I thought the main drain was the vent as it
terminated out the roof. or am I wrong. It all works well though.


It may work, but it is not up to code in most areas.
Just 'cuz it works, don't mean it is right!
Greg