Who touched it last? Layers like to use the shotgun approach. File against everyone and see where the money shakes out, so treat lightly with the owner(s). Be helpful but make sure to tell them it will cost to fix it. Write everything down, take notes when talking to owner, as this would be admisable in court. It **** like this that keeps me up at night... LOLSo short story, I am general contractor in Washington state. We are currently remodeling a 1978 split level. We removed a small sink where the supply lines were coming up through the floor to an angle stops for the water lines. We shut them off and left it for the plumber for the following week to move. 5 days later the valve suddenly broke in the middle of the night. Trying to determine who’s at fault here. My company, or the old valve that somehow broke after being off for a week. Waiting on insurance currently.