Good Sam Community

I have a new RV and noted that the pipe from the black tank is small (2 inch I think) while the gray tank is 3 inches in diameter. Aren't these reversed. I checked to make sure it was not just the handles that were reversed but the smaller pipe is ...

I have a new Nexus Super C with two AC units. Both work properly when on shore power but when the generator is running, either manually or in autogen, when the temp gets hot both ac units try to start at the same time, and it trips the relay switch ...