possibly huge problems with plumbing - extensive post
I am stumped here, as is my dad who has been a homeowner for many years and dealt with many issues.
History - House is a duplex, both sides tie into one main drain (which is under the other half of the house we do not own). My half was abandoned for many years, other half was in daily use. My half is still being remodelled and not lived in full time.
First issues we had was after several weeks of remodeling, the line backed up and we unclogged it. The first bend under the ground level toilet looked like it imploded many years ago, never figured out what it was from. Weeks after that it clogged again, and we snaked it again and it was fine. Fast forward to now, several months later, I THINK we are clogged up again.
Here is where details pour in. You can smell sewer gasses from the front of the house. We think a vent is right in my neighbors driveway (would they even put a sewer vent ground level? WHen it began backing up this last time, the smell was realllly strong. Also seems like there is an odor in the house. Neighbor has what I'm pretty sure are drain flies in his downstairs studio, which he did not have last year. The drain fly infestation is somehow finding its way through the walls to me. His studio apt has been vacant several months, maybe the traps are dried out.
I had people stay over the night before this happened, and think perhaps a female flushed some feminine products down there, but can't imagine one or two would block the drain like that.
**As of now, the toilet flushes several times, but after 4 flushes I assume the water backs up. When flushed the bowl fills with water from the tank, and the water slowly drains out, HOWEVER, it does not drain to the normal water level. The bowl now drains almost to the lowest point in the bowl, and starts to bubble. If I now flush the upstairs toilet, it will create a lot more bubbles. This makes me also wonder if the vent/stack is clogged, would it do this? There are also no trees for obstruction.
I just wanted to cover all aspects. HOpefully someone has the time to read through this and provide advice. If I can at least rule the vent out thats one less headache.