New pop up owner here. We have set up twice now in the driveway and I still cannot figure out why I don't have any hot water pressure. I hook up my garden hose from house to the camper water inlet. Cold water runs great. I have the hot water tank with a bypass system like this http://www.popupcamping101.com/wordpress/wp-content/uploads/2015/03/CX2A3864-886px.jpg I have the cold and hot water valves open, and the 'bypass' valve closed. I turn on cold water for a while to let water heater fill up. If I go outside and pull the safety valve, water shoots out, so it seems there is water in the tank. But I'll wait an hour, turn on hot water at sink, and I just get a dribble. The most recent time, I didn't turn on the water heater, but I did have it on the first time, and the outside of camper near heater was very hot, so it was working.. just no pressure when I open hot water on sink. This is a 2018 mac 228D, so it's very new, only used a handful of times from previous owner.