When I run a lot of water through my kitchen sink it drains into the carport I assume through the wall. I have looked under the sink and see nothing. I went outside and saw the puddle and was perplexed. My home sits on a cement slab. I don't want to tear out the cabinets or wall. How can I see what's going on without major damage to the home? We are on a very limited budget. Thanks, Wes in Odessa, Texas.

I had the same thing happen to me. The horizontal drain line in the wall had sprung a leak and all the water was draining inside the wall and draining out on the floor.
The drain will have to be replaced. You have two options to go about this.
1) You can remove the cabinet and open up the wall, **OR**
2) You can do what I did. Take out a section of the outside block wall and replace the drain from the sanitary tee to the stub-outr.
I then put up hardware cloth, patched the opening and painted it the same color and the job was done without removing the sink and cabinets. Good luck, Tom