Hi Kevin.
I will tell you what I know with the disclaimer that I am not the expert in the family. Patrick is in construction and remodeling, so he has the answers about our trailer. I do know that our tanks run under the cabinets on the trailer floor. You cannot see them but they have doors for access. They are run off a DC pump and a battery. Our water heater is on the wall, a small unit that runs on LP gas. Does a great job heating water too, takes up little space and is ideal for our purposes. It fires when needed. Click Click Click ... hot water of legal temperature. I still have to get a picture taken for you, but it could take me a while ... I am preparing for our Friday and Saturday run. Anyway, over the tanks we have a plain counter for cash register, odds and ends like napkins and such. I keep my CD Player there too!
Our pipes are PVC for the plumbing. Our electric is surface run in conduit. We left it silver to match the stainless.
Running surface allows Patrick to add outlets easily if and when he deems it necessary. We have a breaker panel too. Beyond that I know we have a big plug in thing for the outside to attach to the electric supplying us. What size it is I am not sure. It is a big black heavy gauge cord I do know that. We also have a generator and an inverter. That is all I know about them!
We have the coated light bulbs for the service areas too. We are required to have those or covered bulbs. These cost a bit more but are easy to use.
Our service window is at the back of the trailer. The window takes up almost the entire back side of the trailer. It is a slide type window. Patrick built the screen window that slides to keep bugs out. It works there for us because of our layout. The sides of the trailer have equipment running the lenght of each side. Well, most of it anyway. We do have a bit of room to add this or that if we need to.
We also have some storage area in the goose neck space. Not a lot, but usable.
The one thing I know people love about our unit is that they can see right into where we work and can judge how clean we are. It is a fantastic selling point. People notice. I have had numerous comments on how clean our place is and how important that is to them. We have nothing to hide. It is a point of pride with us. They love to watch and I do believe CoffeeBluff mentioned this in a past post. I think it was him.
Well, I have to run. I have prep work to do. But, I hope I have given you some clues to what we do.
Best to you!
Kate