RV plumbing book or FAQ?

[kaulike]

Hi all---have been out of it for a while. We did finally get our house built (mostly!) and now thinking of spending a little more quality time with the Overlander.

It is totally gutted, no plumbing, no interior walls or furniture. I had to remove the black water tank, which was actually split---and the less said about it, the better. Bath was previously in the rear. I replaced the sections of subfloor in the back, but left them loose so I could rebuild the plumbing someday. There is no freshwater tank that I have found---it was permanently hooked up to city water and power.

My main issue is that, while I have now built a house and am intimately familiar with *house* plumbing, I don't know all the ins and outs of RV plumbing. For example, I don't even know why grey water and black water are separated, let alone where to put the tanks for best access and ease of use, or how big the tanks should be. Most online resources tell me how to use an existing system, and the wonderful forums here have some very valuable information on rebuilding systems, but what about starting one from scratch?

Short of finding an RV specialist and buying her or him lots of beer, is there a resource somewhere that discusses the "why" as well as the "how"?

Tanks very much! (sorry)

Jeff in northern calif

PS And yes, as I get started on the project, photos will be forthcoming...