I am a handy DIY and new to this forum. I am building a cottage this summer and will do the plumbing myself. It has a basement, mainfloor and a loft - the diagram is laid out as such. I have prepared my first rough draft of an isometric plumbing diagram. I have 2 soil stacks as I want to keep the greywater and blackwater seperate so that when legislation is passed in Alberta, Canada, I will have options. I am going to initially have both stacks empty into a holding tank(s). Would appreciate some advise on what is missing (cleanouts for example) and what is wrong on this diagram.