Don't test like I did. That was a nasty mess.
I am happy though that we can do laundry with out the worries of the grey tank overfilling.
All is good here. I've ran out of projects.
Time to go use the ole girl.
I went to the dump station today for the first time with my DX3. What I learned is DO NOT HOOK UP A STANDARD SEWER HOSE
AND PULL THE BLACK WATER VALVE OPEN. Sewage will pass through and come out the macerater outlet.
What has been learned is that I can hook up my macerater hose and leave my grey water open and it will drain with out the pump on.
Long story short I can dump grey water while at the campsite with my storage door closed. All is good. Sorry for all the above questions.