Still need some help on the hot water issue. Left the rally and returned to the resort in Foley Alabama and hooked up as usual with electric and CITY water. Cut the shower water on and hot and cold ...
Install a check valve on the cold line of the shower, that will prevent the hot water that is at a slightly higher pressure from pushing the cold water back, I did this to stop having to wait for the temperature to reset when taking a Navy shower, the pump might not have enough pressure to overcome the water heater.