Moving kitchen sink cut up the slab floor cani pour concrete on top
I am moving my kitchen sink from one side of the kitchen to the other I located the 3" discharge line which is about 5' from my new sink. I have cut the concrete and i am about put a 3 x 3 x 2 tee and then run my 2" line along and up under the sink to the p trap with a 90. ( I hope this is correct) after that can I just pour concrete on top of the pipe in the trench. I am in California and worry about earth quakes. Do I need a vent. There is only a shower connected to the 3" line with a vent 4 feet away?
Thank you