Toilet water backing up into bathtub and shower, second floor master bathroom
I saw an earlier (https://www.askmehelpdesk.com/plumbing/toilet-backing-up-into-shower-11545.html) question about icky toilet flush water backing up into the shower & tub. As with this earlier poster, I am B-R-O-K-E and can't afford a pro right now. Going to hafta tackle this one on my own.
I understand checking the clean out (mine is not on the street side, but on the side of the house). I'm missing my cap and have an inverted coffee can over it. I moved the coffee can & there is a vertical pipe that leads down to the horizontal pipe. The vertical pipe is about 12-15" long. There is sewage gunk all on the edges of it, leading me to believe that it is probably backing up when my bathroom upstairs is backing up. There is water trickling down the horizontal pipe as I look in; not sure what that means about where the clog is. I understand that I may have to rent a sewer machine (Ridgid K-60 was recommended), and I think I can do this!
A bit of history: The toilet has had trouble flushing for the past couple of days. It backs up right to the rim. Several hours later, it's gone back down & all is well. The water in the toilet at that point is usually brown. When hubby and I took back-to-back showers yesterday, the shower pan was FULL by the time I finished my shower. This morning, upon flushing the toilet & trying to plunge it to make it go down, the water that backed up into the tub & shower was brown & BLECHY!
I'm on city sewer. Never had this problem before. House is approximately 8 years old. Pipes are PVC. No sump pump in house. There is a second toilet upstairs, and it is doing the same thing. I don't know at this time if this problem is affecting the kitchen sink or downstairs toilet.
What I want to know is: Is there any way I can try to clean this problem with a snake from inside the house? What was the 'vent on the roof' discussed in the previous question? I don't know if I have one of those or not.
Thanks for any help!
Tiffany