Originally Posted by argy
Welcome to the Forums.
From my manual, it shows the standard 24 gallon tank in the 20 and 24ft. In the 24 ft. there was a 50 gallon option which was the standard tank of the 28 footer. Trying to put a 50 gal. tank in the 20 foot model is problematic. Hope this helps.
Our 1974 20' Argosy MH has about a 24 gallon tank located on the right side just behind the entry door. It also has an auxiliary tank located in the back behind the rear axle. This one is obviously not a Chevrolet installed unit as its made from plate steel. I'm not sure if Airstream installed it or if some former owner did. It does have a switching valve which allows us to switch tanks easily.
Air forums # 1674
1974 20' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels, brake drums, windows & holding tanks left to sell)