2013 Infinity Grey Tank Questions

[Hawkeye0282]

All-

I have a 13 Infinity 3470RE trailer with quite a laundry list of problems ranging from trim falling off to the entire hydraulic system failing and major leaks... My newest question is when we have gotten to use our trailer (twice in 12 months... It has spent over 5 month in the shop over the last 12) grey water tank 2 never takes on waste water. So, my black is filling normally and grey 1 fills quickly but grey 2 does nothing. I was told by CW that grey 2 is only for a washer dryer? This is very different from my previous experience. Is anyone else's Infinity trailer plumbed this way?

-William