Griff in Fairbanks wrote:
StingrayL82 -- IIRC, Leeann posted an image of the plumbing for her motorhome a while back. If you can't find it, I think I saved a copy of the image on my computer. I could find it and email it to you.
It sounds like your gray and black water system was modified by a previous owner. I like separate gray water tank(s) for sinks and shower, with a diverter valve so they can be dumped separately from the black water tank. (Most government regulations allow more options for dumping gray water, in addition to using a dump station.)
I'd start by determining what would be best for you, especially in terms of dumping the tanks. (i.e., dumping the gray water tanks separately and/or being able to dump them into the black water tank.)
You'll probably find you need to dump gray water more often than black water.
I'd also catalog your drains (including toilet) and fittings on your tank.
It's possible to add fittings to plastic tanks. If you find you need to do this, I have additional information available.
Nope, Monaco was dumb enough to build it this way in '76. Remember, my rig has only had one owner, and all he did was maintain it. The black tank is 31 gallons, so it'll hold the waste and shower water for a bit, before needing to be dumped. Here's pics of Monaco's genius setup. Ignore the foxtails, my weedwhacker is down at the moment.
