I think my shower drain thing is finally done. what a cluster fucking fuckface.
I believe it was just a clog about 42ft out of the house.
Interesting that I didn't find the cleanout until like day 3 of 53 or however many days I've been dicking with this on and off.
there's 2 cleanouts I can see in the foundation wall between the splits of my split level house in the basement. one is clearly the toilet, because I can physically see the connection. The other I thought was the upstairs toilet, it was right next to the first one, identical pipe. I couldnt' see where it connected so I took the cap off, and ran the shower for a few minutes and nothing came out, so I thought that wasn't it. Turns out there was just so much volume in the pipe between the shower and clog that it didn't back up and come out of the cleanout. It did eventually when I figured it out and let it run for 5 minutes.
SO
with 50ft of cable out of the big ass drum I have now with the 3" cutter head on it, I ran it in and out twice today. What a workout. It's manual feed. I put a drill on it, I think I ruined 2 drill in the last week doing this BTW. but you had to lock down the cable with the set screw, spin the drum with the drill, walk the drum towards the cleanout, stop, let 2ft of cable out, back the drum up, lock it down, spin the drum, walk it towards the cleanout, and repeat 25 times until all 50 feet was out. Sometimes I would get lucky and could pull a few feet out without the set screw set, but it would just bind and twist the cable in the drum and get tangled eventually.
Then with 50ft out, I had my wife spin the drum with the drill real fast and I went outside and listened. It's in a pipe right on the outside of the foundation wall. When it gets to the part where the original garage ends, and the new garage starts, I stop hearing it but I sorta do hear something faint. It turns and goes under the new garage. Awesome. Well, I don't need to get to it right now, but that kinda blows that they covered it with the garage and now I have no way to access it if I ever needed to. I found a sketch from 1960 on my engineering drawings that confirms this. It's not to scale or anything but I can see the intention and I'm positive now that it's under the new garage.
All flows well now, hopefully that greywater system stays working for another 50 years.