I have a 2020 29m. The fresh tank is 50 gallons or very close. I haven’t measured it, but this is my 4th RV, and I can tell by the time it takes to fill having filled up a lot of them in my day.
I also used to work with aquariums and I can tell you by looking at the tank it’s roughly the size of a 55 gallon tank (with slightly different dimensions of course)
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