kitchen sink, dishwasher drain backed up
Kitchen sink is backed up. I guess dishwasher and kitchen sink share same drain (also next to each other). Dishwasher also gets backed up. There is a clean out access outside the house directly in front of kitchn sink. When i first opened it it had lots of grease looking blob, if that makes sense. Cleaned it out and helped back up for little bit but with plug back on now its backed up again. Also, the washer machine water ends up on this drain becasue we noticed that when washer drains the kitchen sink and dish washer get full. Im in process of getting an elctric drain snake problt 1/2 in by 50ft and just start running it whereever i can. Obviously new at this. Just wondering if any one has ideas or sugestions? Also, i have septic system but i figured if it was full i would have issues in all the house drains and not just that one. Thanks so much for any idea as.