Hey All - Well, as long as I have been camping in a pop-up (20 years), I've only used the on board water system 1x. And did not use the water heater with it. So, do I need to do anything special to use the water heater when using the on board water tank/pump? I know you are not supposed to light the heater unless there is water in it. . . . . How does the water get there? The same way as with a city hook-up? Gosh, I feel like an idiot asking. . . . . I have an Aliner Ease with electronic ignition heater. The water pump system worked when I bought the camper in June, so I expect it is still ok. Thinking of venturing out to an electric only site. Thanks.