Thanks for the reply (you are a patient individual) -
I should have clarified in my previous post. No plumbing exists today. This is a layout for a standalone farm structure. The positive it that I can lay it out however it would be easiest and the least complicated. The negative is that it will go in/under a yet to be poured slab, so I want to make sure I get it right.
I have attached a revised drawing.
If you look at the revised drawing, (Starting from left to right). I have 5 green rectangles that would represent WYE connectors coming off the main drain pipe.
I believe I understand your comments. The one outstanding question I have regards the WYE Connector being positioned between the WC WYE connector and the WC Flange. (I did not draw this one, but I understand it to replace the WC vent WYE)
I understand you to say that I would not need rectangle number one (left to right). I could vent the left sink using the WC vent. This would eliminate the left most dashed vent line - correct?
Where I am struggling is - If I put a WYE connector off toilet elbow, wouldn't I then have to cross back over the 3 inch Drain Pipe to tie it into the sink vent? Or are you saying that the sink does not need a vent pipe (ie no pipe would be extended above the height of the sink. I would cap the left most sink PVC at the top of the stub out).
To further convince you that I am thick - why does they recommended WYE connector for the toilet wet vent come off the WC elbow? Why wouldn't it come off the main waste pipe in between the WC and left most sink.
Thanks again - I REALLY appreciate it.
Originally Posted by massplumber2008