Well, a quart is the limit of hot water in the 16'.
You should have valve a and c open and b closed. In the drawing B, the closed one, is the one in the middle. The other two should be open. I will check to see if your model is different online but that is the way mine is.
Also make sure that your water heater is on and did not run out of LP gas.
If you are hooked up to the campsite water spigot then you have water?
OR, if dry camping, is your water pump on? Just checking.
Here is a pic (double-click to make larger) of a Sport manual diagram. Hope it helps. I did not see a diagram in the new model book. OH loo