Found kitchen sink drain to be plugged tried using handheld and was unsuccessful I got it out about 6 feet and then it kept getting stuck. I then ran chain knocker down the line and after multiple times passing through I was able to get the cast cleaned up. Everything is now draining properly. If drain plugs again the chain knocker will have to be used due to their being at least 6-90s within a 10 to 15 foot distance. I verified everything was working with a camera inspection.