We had a pr-tech out prior to us arriving who needed an additional opinion. Senior tech arrived and discovered that the drainage needed to reconfigure and the condensate for the furnace discharge ties into the kitchen drain with no back water valve. Client has stated the condensate has been like this for 15years once the furnace was replaced and they have never had issues. I did discover a way to tie the condensate into the main building drain properly. For today, the client would like us just to reconfigure the drainage so they can at least use the sink. Client is fully aware that the set up is not code and MyGuy Plumbing is not responsible for if the sewer line backs up and causes any issues. I will leave a quote to reroute the condensate drain correctly in the basement, I will give a credit from today towards that service.