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Wednesday, June 08, 2011


Your 5th Wheel axle ratings seem to be different than the GVWR numbers which is correct ?

Hi Marvin,

I'm not sure I understand your question. The axle ratings (GAWR) on our fifth wheel are 7,000 lbs per axle on our old RVIA labels. It is standard that the total GVWR on a fifth wheel is 15-25% above the total axle ratings (i.e. 15-25% of the total fifth wheel weight rests on the truck). Our GVWR is in that range.

Of course, we removed the axles and replaced them with independent suspension and running gear rated at 8,000 lbs per axle, so the old axle ratings don't really apply anymore.

So what cost more, running with a full tank of water or dumping the fresh water and buying replacement water when you stop? Does 800+ lbs of water lower your mpg? Is all you can take fresh water part of full hook ups? You can see I've never rv'd before.

Hi Pat,

Generally, there is no need to run with a full tank of fresh water. Eight hundred pounds of fresh water most certainly lowers fuel efficiency in addition to adding unnecessary (in most cases) weight.

When you park in campgrounds of any type, most often you will have water hook-ups and it won't be necessary to fill your fresh water tank at all (the water from the hook-up supplies your plumbing system). However, on the occasions when there aren't water hook-ups or you just choose to camp without hook-ups (boondock), you will need to put water in your fresh water tank. In campgrounds, there is usually a place to do that on-site. If not parking in a campground, you will have to fill up ahead of time.

Most of the time (99% of the time) there is no cost to fill up your fresh water tank. But even in the rare situation where you do have to pay a fee, it's negligible. So, dumping your unused fresh water to go from one place to another and filling up at the destination is far less costly (in multiple ways) than running with a full tank.

FWIW, the term 30# propane tank refers to the weight of the contents not the tank. A full tank will be probably 10+ pounds heavier.

Yes, Fred is correct. When we say "30 lb" or "40 lb" propane cylinders, that does refer to the weight of the propane in the cylinder, not the cylinder itself or the combined weight of the cylinder and the propane.

It's one of those "liquids" that is not considered "offloadable" so it's included in the UVW that is subtracted from the GVWR to get CCC.

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