Do RV water heaters have a check valve?
Do RV water heaters have a check valve? NOTE: The check valve on your RV water heater keeps the hot water flowing in one direction out of the heater, while preventing the back-flow of any water from your plumbing to enter back in. What is a check valve on a hot water heater? A check valve is a device that is installed in the pipes connected to a water heater to prevent the backflow of water. When the flow of water stops, the check valve closes so that the water cannot reverse direction and flow back the way it came....