Leaking hot water, outside the house
One of my husband's friends is having this problem. The kitchen sink has some sort of pipe that vents to the outside wall of the house. The sink is set up against this wall. The pipe on the outside of the house is dripping hot water, in a fairly steady stream. If any faucet in the house is turned on, the leak stops. My husband says the pipe does not seem to be directly attached to the hot water heater. I've never heard of this problem before. Any suggestions on what is the cause? What is the solution?