OK, as promised a resolution to the plumbing quandary.
Camp N Brew2 your suggestion worked like a charm.
Jeff is the winner! Grey tanks only accept the grey water on my rig. So outside sink, bathroom sink and shower all go to Grey Water tank #1
Toilet goes to Black Water
Kitchen sink to Grey Water #2.
Now for the good part.
The tank empty valves have colored handles. Above the grey handled valve is a nice sign telling me it operates the Black Water tank
Above the black handled valve is a nice sign telling me it operates the Gray Water tank.
You guessed it the colors on the handles are correct the signage is reversed.
Gosh Keystone must be a fun place to work, all those jokers
on the line.
Thanks you guys for the advise and help. I have cleansed the water system, pressure checked it. A-OK. We are almost ready for our maiden voyage this coming Thursday.
Our first dog show of the season.
Oak