[thegumbos]

After doing some more research I found this earlier post from kendotmontanaclub:

Probably not a big deal for most campers, but I discovered today that the specs for freshwater holding tank on 2019 model 305 RL is in error. The Keystone webpage identifies the fresh holding tank at 66 gallons. With a flexible camera I was able to visualize the part number on the side of the tank as W1468.manufactured by Ameri-Kart. They confirms that this is a 50 gallon tank. I spoke with Keystone customer service today. Agent placed me on hold returning saying that she had spoken to management and that there was nothing they could do about the variance. Apologies made and end of discussion. Suggest to club members, be suspect that specifications stated at time of sale and on Keystone's webpage as of this morning are invalid, you probably have a much smaller freshwater tank capacity then published.