I had this problem and the owners manual that came with my 2019 Sunstar VE was Wrong
![Banghead](https://www.winnieowners.com/forums/images/smilies/banghead.gif)
I remember some words got exchange with the Dealer because they all but called me an idiot. I was following the manual to a Tee and their very basic instructions but no drain. They even went to another Unit to prove my ignorance.
Mad as Hell I called WBGO who were saying the same thing. Didn't take them long to figure I had wrong owners manual for my serial number. They overnighted the new owners manual. They had redesigned in the newer version.
Turns out I have 2 sets of drain lines (red and blue) one in wet bay and the other under the sink in outdoor kitchen. You have to open all 4 valves. You won't see much but turn on the water pumps and it pumps out in like 5 minutes. I had the v2 of 2019
FWIW, I never used the Pink stuff, it has been 4 years