Several years back, my wife and I returned from a weekend vacation. Our Phx, AZ home and had very soggy floors. A water pipe buried beneath the slab had developed a leak and the pressure forced water up through a crack in the slab. The insurance company spent a fair amount of money replacing carpet, jack-hammering the slab to fix the cold water pipe, etc.
Fast forward about two years. I began noticing that every time I turned on the hot water in the master bath, it was hot within a second or two. Our hot water heater, located in the garage, was probably 20 feet from the bathroom. Hmmm.....sounds like the hot water pipe was leaking very close to the master bath. As before, the piping is under the slab but this time, no soggy floor......yet.
I called the insurance company to inform them of the problem and that this time, they could fix the leak before it ruined the carpet, flooring, etc. NOPE! They only fix the damage once it had occurred. I told them that I could wait but it seemed silly. They informed me that since I knew it was now leaking and I had informed them, they would not be paying on any claim I might submit once the leak was bad enough to again cause damage. I guess there is a monetary reason for the "don't ask, don't tell" practice.
So I had the house plumbing replaced.....putting the pipes in the attic and dropping down between the wall studs instead of coming up through the floor. That way, when the piping failed, the ceiling would immediately be soaked and no one would know about it ahead of time.