Dry Stack House Plumbing Issues
Hello,
Here is a link to images.
http://imgur.com/a/GQ8Bd
I am a slightly handy young man with limited plumbing experience building a dry stack house on an extremely tight budget, [I'm a teacher]. It is loft style, so really tiny, about a thousand square feet. I am struggling to find all of the answers I need because I will not be running piping in the walls.
http://imgur.com/a/GQ8Bd shows an image of the drain system I have planned. The trenches are the footings. Will this work? I understand the slope issue, I am asking about the layout.
I am getting mixed information about the size to use for the drains. 1 1/2" for sinks? 2" for showers and tubs? What about toilet?
Where do I have to have Clean outs?
Ok, on to venting.
Since I have to come up six inches about the highest point of the fixture and I can't put them in the walls I was hoping I could just run them to the top of the room exposed inside and meet them up and then vent outside. I am hopelessly lost on wet venting horizontal venting so I pretty much vented everything independently, not sure if all of that is needed. I understand I need to vent them within so many feet of the trap. Will this system for venting work? Will it pass inspection? The office is not being helpful.
Ok, on to supply.
I am hoping to run PEX line below the concrete, red blue to each fixture. Because I have drain lines running everywhere planning supply lines seems to be a nightmare. I have to be one foot above them when I cross them so I guess this means I just need to put my drain lines really deep? I have heard mixed issues with running the line in protective piping. I was planning on only using sleeves when crossing a drain line and when penetrating the concrete. Can I just run the lines 4 inches or so below the slab while one foot about the drain pipes and backfill over them with sand?
Again, I am not sure on what the best size supply lines for the different fixtures should be.
Since the whole set up is a touch unusual, where do I have to have clean outs?
I appreciate any advice you can offer me, even if you cannot answer everything.
I appreciate your time,
Nicholas Miller