Looking for advice. First of all, i have a combi boiler in a utility room, can i fit a toilet next to/under the boiler? Is it safe etc? And also need advice on where to run the soil pipe. On the photos, the red circle and line is where the soil pipe would exit/run. Can i run it to the thick black pipe even though the soil pipe on the existing bathroom toilet runs into the ground (is that black pipe just for gasses to escape lol) and can the drain pipe and boiler condensation pipe (if thats what it is) be cut into the soil pipe. Or, can the new soil pipe run into that first drain? They all run into the same manhole, i know this as i had it up the other day. I hope this makes sense, thanks for any advice.