I have a new bar sink in my basement. The only remaining jobs are to tie the pex lines into the main water lines and to connect the sink drain to the sewage pump. The part that has me a bit troubled is preferring to avoid opening the sewage basin, or drilling a new hole in the top. I noticed the basin has a vent pipe and was wondering if it would be permissible to connect the drain from the sink into the vent pipe using a wye fitting.
UPDATE: I went ahead and did it, and it has been working and properly pumping just fine.
In the image below the pipe on the far left can be ignored, as it is for the sump pump. The pipe on the far right is the sewage pipe, and the pipe in the middle is the vent pipe.
If I were to do this, would it be to code? Or would it cause problems when eventually selling the house?
If not, is there a relatively simple alternative that wouldn't require a new hole in the sewage basin lid?