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Old 05-24-2016, 01:53 PM   #15
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Our PA drives better with half to full tank of water. The phaeton I don't see any such difference.

We dry camp and boondock so usually have half to full tank of water. I don't get concerned about the extra weight, or sloshing, etc.
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Old 05-24-2016, 01:53 PM   #16
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I took my drain plug out and replaced it with a length of Pex going back right beside the dump valves. Then i added a small valve and a short length of Pex out of that and I can add a couple gallons just for washing up when dumping. Very handy.
Good idea if you're in a place that has no water.
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Old 05-24-2016, 02:02 PM   #17
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80 x 8.3 pounds = 664 That's alot to carry. As long as sloshing is no problem for you while traveling, take what you need.
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Old 05-24-2016, 02:19 PM   #18
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That's the point of the post. Finding out of sloshing water would be a problem. I've never towed with a partial tank. But based on what others have said it doesn't appear to be a problem so i'll give it a shot.
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Old 05-24-2016, 02:36 PM   #19
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In our popup it was a problem. Enough of a problem that we went about 10 miles then I opened the drain and proceeded. With our 5'er, it has not been a problem, although I seldom do it.
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Old 05-24-2016, 03:25 PM   #20
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I use a travel trailer to travel, imagine that. I fill the tank as I can and drop the waste tanks as I can. The levels go up and down as required. With enough truck, there should be no problems.
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Old 05-24-2016, 07:10 PM   #21
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Your fresh water tank is really only 70 gallons. They take into account the 10 gallons in the hot water heater as part of your "80 gallons fresh water capacity." We have the same trailer, I've yet to pull it with water in the tank so I am no help.
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Old 05-25-2016, 07:36 AM   #22
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We're dry camping. I kinda have to bring water. I just don't need anywhere near 80 gallons of it.
The fuller you make the tank, the better the water will keep because of higher ratio to air.
I drain and refill with fresh water regularly to keep it fresh.
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Old 05-25-2016, 07:41 AM   #23
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We've been Rv'ing for a long, long time and always leave home with 1/2 to 2/3 rds tank of fresh water. Never had a problem going down the road and a few times we really appreciated the fact it was there to use!
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Old 05-25-2016, 07:48 AM   #24
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Do the tanks have baffles? Those help with sloshing.

Personally, I wouldn't worry about carrying less than a full tank. As a maple syrup producer, I collect sap in the spring in a tank on the back of my truck. The tank holds 350 gallons and is rarely full until my last stop. At 100 gallons I can feel it slosh a little bit when I come to a stop but it's little more than a slight sway. At 50 gallons I probably wouldn't notice it and it probably wouldn't do much to a trailer.
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Old 05-25-2016, 08:03 AM   #25
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Water tank...

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Originally Posted by archer75 View Post
I have an 80 gallon fresh water tank. I certainly won't need to bring that much water, 40 gallons would do it. However only filling it half full would have a lot of weight in water sloshing around and i'm concerned it can cause issues with towing.

Should I be concerned about towing with a half tank of water or should I fill it all the way to eliminate the sloshing movement?
It will be a short 80 mile trip up and over Mt. Hood in Oregon.
At the risk of getting flamed we always travel with the tank full, for several reasons...

1. We have arrived at campgrounds and found that they are having problems with their water systems (campgrounds rely on boost pumps and in one case they had a power failure).
2. Weight has very little effect on gas mileage. Pushing or dragging that "brick" through the air (frontal wind loading) is what kills the mileage.
3. The weight of the water low down on the unit increases stability, as it lowers the center of gravity.
4. After experiencing a breakdown, our friends unit spent 4 hours sitting on the side of the road, then a day and a night in a repair shop lot. They stayed in the unit to keep things safe, and had plenty of water.

To us it's like using seat belts, you may never need them, or the extra water, but it's sure nice to have it if you do.

JMHO
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Old 05-25-2016, 08:25 AM   #26
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Originally Posted by archer75 View Post
I have an 80 gallon fresh water tank. I certainly won't need to bring that much water, 40 gallons would do it. However only filling it half full would have a lot of weight in water sloshing around and i'm concerned it can cause issues with towing.

Should I be concerned about towing with a half tank of water or should I fill it all the way to eliminate the sloshing movement?
It will be a short 80 mile trip up and over Mt. Hood in Oregon.
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Originally Posted by powderman View Post
The weight difference between half and full is only 300 lb. It won't make a difference in puilling, and I would rather have it and not need it than need it and not have it.
powderman
I agree.

archer75
While traveling my 100 gal fresh water tank has been at many various/different levels during the 20 years, (148k miles), I've driven my MH... (as have the 50 gal. black, 50 gal. grey, 90 gal. diesel fuel and 35 gal propane tanks).

"Sloshing" has never been noticeable or problematic.

Mel
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Old 05-25-2016, 10:26 AM   #27
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This is over thinking. Just put in what you need and hit the road. Only way it would be an issue is if the tank was in the rear of the TT. I bet the only thing you'll notice is that the TT pulls better.
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Old 05-25-2016, 11:20 AM   #28
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2. Weight has very little effect on gas mileage.
I live out west. Dragging more weight up long hills most certainly does have an effect on fuel mileage.
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