first time poster here. I live in KY and just finished my bathroom installation. Bathroom is located in the basement and it drains to a Extractor basin which is then pumped to city sewage. i would like to add a sink on the opposite wall as the plumbing for the bathroom ideally without having to cut any concrete. My main question is where to drain the sink. Can it go to the Vent from the Basin or would it be ok to add a hole in the top of the basin to drain the sink into. Venting the Sink isn't an issue, just the drain. I've attached a picture of the layout. thanks for your help!
