Cristo Balete wrote:S Usvy, urine and paper is considered black water, so that isn't supposed to exit the house unless it's into a septic tank. So that's why urine going down that greywater line is not good, unless you set up a reedbed system that is contained and not allowing the liquid to touch the soil until it's been in the bed however long it's supposed to be there. Canada has some municipal reed bed systems, so they've decided they are okay for municipal waste. I'm not sure of all the requirements, but it is being done legally in some places.
I can see why you wouldn't want to tear up your cement to change that. If you sell your house, or your house out-lives you, which it will, it will have to be disclosed that it's hooked up wrong, and that is a serious code violation. If you don't get those people back to fix the code violation they created, it becomes your responsibility. New owners have to right to expect to be able to flush the toilet and not have it go out onto the ground. If it's going to change hands,t you could just plug the whole thing up as it exits the house, and don't sell it with the greywater line feature.
Peter Ellis wrote:I am curious about something - does Oasis recommend 1.5 inch as a minimum? Or does the author recommend 1.5 inch as the size to use? I am having some difficulty seeing where there would be a problem staying with the 3 inch pipe and can't imagine why he would recommend against it.