Slab leak was not discovered during the inspection. I called the inspector, and he said there is no way to test a slab leak.
We were lucky to find the plumber who serviced this house during our escrow period. The plumber told us that the sellers had a major leak and didn't want him to fix the leak, instead, to put a temporary fix and install a shut-off valve so they can turn the water on and off intermittently during use. The sellers did not disclose this leak to us during escrow.
We now have mold, also, due to the leak.
We originally discovered the problem when the painters told us that our floors in one particular area was warmer than the rest. (He would sit there during his lunch). A few days later, water was seeping out through the wood and the baseboards (MDF) was expanding and warping.
We had a mold testing guy come and he had an instrument (similar to a stud finder) that detects moisture on the wall. And he also had some gun-looking instrument that detects moisture by infrared light.
Anyone had experiences with non-disclosure? Will repost this on a different topic.
All the info helps, repipe versus reroute. Thanks.