After seeing so may Rvers lose their water heater cover. Here is a quick tip that could safe you some unneeded expense. When you get ready to take off in your RV, whether leaving a campground, RV park, or home, always remember to do a walk around on your RV to make sure everything is locked and secured. A lot of people over look their water heater cover because it's such a small lock. However remember to always twist the clip horizontally and downward to snap it in place.