Winnebago does give us some really nice things online to look at what we've bought without having to crawl around too much!
https://catalog3d.winnebagoind.com/menu/Parts.htm
Looking at the water, I find this picture of the area and it does show it as a second drain, often called a low point drain. I did a few markups to show what is there.
If this is a new area for you, watch that line at the far right that can be used for drawing anti-freeze in with the pump. Handy when winter comes but if left in the wrong position, the pump is cut off from drawing from the tank and still just sucks onthe capped off suction line!
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!