OK- the stubby pvc piece coming out of the left hand side of your stack is a clean out - DO NOT connect anything to this. The old (appears to be cast iron) pipe connecting just below the clean out is either a sink drain line or a vent - depending on what it connects to ( can't tell from the photos). The other pipe that come up out of your floor and goes through the wall COULD be a vent line - but I would be surprised if it was still active since there are now regulations regarding how far above ground level / roof lines your sewer line has to be vented (of course, if it's an older home, it could have been grandfathered in). In the floor next to that pipe is another clean out - again may or may not be active. The drain in the floor is just that a floor drain. It may or may not connect to the septic line, but regardless you wouldn't want to use it as a toilet drain - they are NOT the same thing and shouldn't be used interchangeably. What I would suggest is to have a plumber come out and give you an idea of where the pipes are running under the concrete. You MAY be able to break up the concrete yourself, but cutting into the main sewer line and running new cast iron (which you should do under concrete) is a job for a pro. BTW you would be cutting into & tying into the line in the first photo - but UNDER the concrete. The only reason you would need an up flush toilet is if your sewer line left your house at a level HIGHER than the floor. To have pros in to do the job for us was about 3k - but we had them break up significant amounts of concrete to locate the toilet where we wanted it. Good luck!

Could be. I would speak with a plumber to get a better idea. Not only will the floor have to be cut and replaced you also need a vent pipe runing out the roof. This may be a problem. He could give you cost estimates. The plumbing would most likely be the most costly portion of the job. Good Luck !

Why waste money and time over this. If you have access to the basement wastewater drain pipe you can install a toilets that pump the toilet waste upward into drain pipes above. Cost about $600 and you are done. I did it on my own.

I live in Chicago and have a condo in a 6-unit complex. We just had our main lines and side gangway all rodded out about a month ago but we had sewer back up come up in our boiler and laundry room drains. Anyone have any idea why it would be backing up? Do we have to put a backflow preventer down by our catch basin to prevent this from happening again? Where does that water go then, stay out by the city sewers? Besides for our drains backflowing our whole building has problems with the back area flooding. Our roof tilts towards our backyard. There are 2 downspouts which flow away from the building. I guess we had the downspouts directly into the catch basin but that always overflowed our laundry and boiler rooms. Heavy rains still flood our basements; through walls, through drains. We have no idea where to put this water until it has time to drain slowly through the catch basin out to the city sewers. Any suggestions at all would be appreciated.