I didn't know it when I had a burst pipe - it was probably under the house and this area is land of sand. I've lived with basements before, and with cripple walls, but now I live in a no base level building, sitting on slab. It is in an ill begotten housing track that I don't just hate since I like the look of the places and the people. The developer was a devil, though, and I can say that since I have designed for major developers (2). Most of the houses on my street have replaced the plumbing, some (before a bunch of us got here) via lawsuit. Real estate agents, including mine, must have known. I liked her, Dys liked her, she knew a lot of New Mexico history.
I take it my line break was within or under slab. I only found out when the once a month guy from the water company told me about rampant water loss, humongous.
Early on, I saw the slab in one room - when I took up the carpet- had run out of concrete. Plain dirty sand in one part of the room.
I told you all it was a lemon, the embarrassing thing is that I didn't pick it up when I walked through (I saw stuff I thought I could fix), a mix of me needing to move fast and the inspector being an ass, not so much on the use of polybutylene pipe, though grrr on that, but missing about five other things. I might be able to sue but I don't have the style or the energy.