Here is a quick update before the Baja trip:
This shows the one gallon hot water heater mounted and plumbed to everything but the shower unit, which is in the platform.
This shows the vent outlet on the left, the flojet pump and connections to the hot water heater.
This shows the three switches which operate the bed systems. from the left is the inverter on switch, the water pump switch, and finally the hot water heater switch.
This shows the platform reinstalled and the view of all of the plumbing and brackets. The two stormcase units fit just perfect, with space on each side for items like the speargun, shower enclosure, etc. On top of the water tank and cases, the freedive fins slide on top, along with the Biotoilet and collapsible trash bin.
This gives a little better perspective on the storage space, and also shows the rear faucet connection and on/off valve.
Yes, it all works, and greatly exceeds my expectations. The pump has better pressure than my house, and provides a strong stream of water. The hot water heater also works excellent, and heats the gallon of capacity in less than 15 minutes. I increased the thermostat temp to get the water nice and hot (about 170 degrees), which will make the gallon last a long time. The heating element does pull about 60 amps. It will be interesting to see how many showers the hot water heater can support without the heating element running.