In removing a gas hot water heater the cold water was shut off at the heater and flex pipe disconnected. The hot side flex pipe was disconnected and residual water was draining from the house pipes. However this draining would not stop and it was at was at a fairly heavy rate. With all house faucets off and cold supply water on to the house, this discharge from the hot water pipe continued. There are 3 single valve faucets in the house. One at the kitchen sink, and one at each of two showers. If this could be the cause, how do I determine which one it is since there are no individual shut off valves for the two showers. Thank you.