Washing Machine/Black Water tank
I also have a 38Q - 2014. Yes, I also found the washer dumps into the blackwater tank. It is a 75 gallon tank, but after 2 loads, odor starts to come up in the toilet every time you flush. I don't know who conceived this idea at Winnebago, but it wasn't a good one in my opinion. This summer we plan to be in a campground that allows dumping of grey water, but not black. They provide a honey wagon once a week as part of the camping fee, but that probably means always washing the day before "honey wagon day" and being very careful about loads at that. I want to look into temporarily redirecting it into some kind of tank just for this coming summer.