Thanks for your pictures & comments speedball. We poured the concrete yesterday, but this was after totally pulling out the 1st pvc & completely redoing everything. Better & below the footings.
The 2nd plumber was much, much, better... had a helper & took two days to do the job.
The kitchen drain was still a 2 inch & is in a peninsula... we plan to use one of the 'air admitance valves' for the sink run... not totally thrilled about that... looks like it could fail someday & let 'gas' in... but all my searching on the internet says it is OK.
We replaced the 1st plumbing because of the code violations & the fact that all the work was done in a day by one person. I totally lost confidence that it would be without major trouble. Especially since he never bothered to test his work.
Besides being deeper & 'probably up to code' we split the system & will have two connections to the main sewer. The kitchen flows to the guest bath & then to the street. The utility room, water softener, go to the master bath & then to the street. This elimanated the long run under the house. And there is also the double direction cleanouts on both sides of the house.
I will remember your comments about using 3 inch for the kitchen & vent. Don't really know about that code requirement in Texas but will check it out. I'm having the codes researched.
The concrete work also had several problems & cost an extra $1300 to try to fix. Regrettably the builder appears to protect his subs more than me. I was able to get the concrete done without them adding additional water so the final product should be a lot stronger.
Thanks again for your help... P.S. The stone, marble, granite expert website is www.mbstone.com
. He is truly one of the most knowledgeable persons in the world about stone and has his own website. He provides answers on several 'stone' related websites. I think you could have a similar website.