[Carl n Susan]

All of the Montana brouchures and spec sheets say "Fresh Water 66 Gals.". Nowhere do they mention the tank or its size. The Fresh Water capacity is the 50 gallon tank, 12 gals. in the Water Heater, and however much water is contained in the 1/2" Pex and fixtures is the piping system (I bet it is very close to 4 gals.).

I am sure someone will do the math on how much water a 1/2" Pex can contain per/ft along with how many feet of it there is in a rig. Me, I really don't care. All I worry about is getting my 45 gal. bladder full of water into the fresh water tank.