I have a Saniflo toilet in our basement and the bathroom sink is tied into it. I would like to change the drain pipe from the sink to drain into the existing plumbing so it doesn't drain into the toilet, which causes the toilet to flush often. Originally it was plumbed this way because Saniflo said the sink wouldn't need be vented, which was not accurate. We are now doing renovation above, so we can properly vent the sink. I have two questions.
1. If I was to remove the sink drain pipe from toilet, it would leave about 3ft of pipe behind a tiled wall that goes from the adjacent mechanical room, in the photo, to the toilet. Would it be acceptable to just cut the pipe and cap it? Would that cause any issues with the toilet functioning properly? https://www.saniflo.com/us/home/74-sanicompact.html
2. You can see the drain pipe that comes from the hot water tank doesn't have a trap, but there has never been any smell that has come from that. Is this normal because I would expect odor to be coming from it at some point? That black pipe doesn't have the proper slope and is nearly level, which I know will need to be adjusted. Would this has anything to do with odor not coming back through the pipe? I want to make sure that drain is correct before I tie a sink into it.
1. If I was to remove the sink drain pipe from toilet, it would leave about 3ft of pipe behind a tiled wall that goes from the adjacent mechanical room, in the photo, to the toilet. Would it be acceptable to just cut the pipe and cap it? Would that cause any issues with the toilet functioning properly? https://www.saniflo.com/us/home/74-sanicompact.html
2. You can see the drain pipe that comes from the hot water tank doesn't have a trap, but there has never been any smell that has come from that. Is this normal because I would expect odor to be coming from it at some point? That black pipe doesn't have the proper slope and is nearly level, which I know will need to be adjusted. Would this has anything to do with odor not coming back through the pipe? I want to make sure that drain is correct before I tie a sink into it.