Hi. New to this forum. I am a homeowner doing my own plumbing. I am building a new master bath that shares a wall with an existing bath that has old plumbing. Here is a diagram of my proposed sink plumbing. I was going to use double fixture fittings for back to back sinks plus double fixture fittings to combine the two drains. I have included picture examples taken from another site. I was going to combine these two concepts. All waste and vents would be 2". I am also considering removing the section of pipe that makes a vertical vent of the final waste stack. I would probably also put a clean out below each double fixture fitting. I live in Los Angeles county, California, so all suggestions must meet local codes. Thanks to anyone who can help me out.
