Yeah hey Gene,
I answered k2gkk's post about am I sure it's leaking. Didn't get to Carl's yet. As for the size, considering all things, why not have the bigger tank, which at 80% fill (the pressure cut-off when filling) yields 15 gallons. And the 11.2 tank, at the 80% fill capacity is about 9 gallons. Maybe other folks don't mind finding gas filling stations when traveling, but to me it's one less hassle. And with heat and cooking and soon a fridge using LP, why cut one's self short, if available. I can let visitors stay in the motorhome, and then not have to worry about heat during fall and winter and early spring. And then there's the economics. Applied GMC charges about $498 for the 11.2 gallon, and $419 for the 5.5 gallon. 16% more money for over twice the capacity. What I"m really surprised at is that a new version of this large LP gas tank is not readily available. GMC thought 19.3 gallons was appropriate and I agree. Others may not, but I'll not compromise - yet anyway. I'll probably ask Manchester Tanks to build one and have a new one, not one that's 40 years old, which is the average life span for an ASME tank, cuz you know, it's kinda like a 60 pound bomb you carry around. If any one hing should be bought new for replacement seems it would be the LP gas tank. Thanks for you followup. David

DavidJForjan wrote on Fri, 03 February 2017 00:54

Yeah hey Gene,
I answered k2gkk's post about am I sure it's leaking. Didn't get to Carl's yet. As for the size, considering all things, why not have the bigger tank, which at 80% fill (the pressure cut-off when filling) yields 15 gallons. And the 11.2 tank, at the 80% fill capacity is about 9 gallons. Maybe other folks don't mind finding gas filling stations when traveling, but to me it's one less hassle. And with heat and cooking and soon a fridge using LP, why cut one's self short, if available. I can let visitors stay in the motorhome, and then not have to worry about heat during fall and winter and early spring. And then there's the economics. Applied GMC charges about $498 for the 11.2 gallon, and $419 for the 5.5 gallon. 16% more money for over twice the capacity. What I"m really surprised at is that a new version of this large LP gas tank is not readily available. GMC thought 19.3 gallons was appropriate and I agree. Others may not, but I'll not compromise - yet anyway. I'll probably ask Manchester Tanks to build one and have a new one, not one that's 40 years old, which is the average life span for an ASME tank, cuz you know, it's kinda like a 60 pound bomb you carry around. If any one hing should be bought new for replacement seems it would be the LP gas tank. Thanks for you followup. David

It is always interesting to me that the folks that say get a smaller LP tank or get rid of it entirely seem to be from warmer climates. We fill our LP tank several times a year and would never consider a smaller tank.

Also, the tank that came with our Palm Beach is listed (page 108 of the 1976 Operating Manual) as having a capacity of 62.0 lbs. Divide that by the weight of LP gas (4.2 lbs/gallon) and you get 14.72 gallons, not 19.3 gallons. Did GMC go with a 19.3-gallon tank on some model years? I don't know. I think the 23' footers came with a smaller tank from GM.

80% of 14.72 is almost 12 gallons (11.81 to be exact) not 9 gallons. I know that to be true because I often have close to 11 gallons put in when I fill it up. I would love to get a larger tank if one was available at a reasonable cost and would fit.