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Old 09-04-2013, 12:09 AM   #1
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Driving with a full tank

So I haven't tried it yet but would it be safe to drive with a full tank of water? I'm headed out to an area with no water next weekend and it would be nice to fill up at home before I head out.

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Old 09-04-2013, 12:20 AM   #2
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In general, yes.

There have been a few reports of the supports holding the tanks in place not being beefy enough to support the weight of the filled tank (remember, water is 8 pounds per gallon). But, they're far enough between that I'm comfortable doing it. (Though, I only ever fill to 1/2 - 2/3 of a tank because I have never dry camped in the camper.)

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Old 09-04-2013, 12:30 AM   #3
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That's what the tank is there for. Fill it and go! I do it all the time. As ependydad also mentions, the issues with broken mounts are too few and far between to worry about them IMHO.

A 30 Gal tank holds 250 lbs of water when full. Depending on where your tank is located, your tongue weight may change a bit, but as long as you've got a decent setup it shouldn't make too much of an impact.
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Old 09-04-2013, 01:57 AM   #4
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do almost every time we go camping, for nearly 7 years now.
not sure why you'd think it's not safe? unless you have a marginal tow vehicle.

why would all RV manufacturers install large FW tanks if it wasn't safe to transport them full?
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Old 09-04-2013, 06:21 AM   #5
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Someone reported here that their tank was in the very back end. That's rare but it made the tongue end light with the tank was completely full. If your
tank is in the middle or front end you should be OK.
I also do it when necessary. Some dry camping CGs will have a spigot
somewhere and I fill up when I get there if I know that is available.
If in doubt I fill up at home too.

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Old 09-04-2013, 06:26 AM   #6
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We noticed the fiver behaved a lil' differently with 1/3-1/2 tank of water. It chucked more while driving. I figure it was the water sloshing around. You'll burn more fuel hauling more weight around. If it were me, I'd try and find fresh, potable water and fill up near my destination.
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Old 09-04-2013, 06:37 AM   #7
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In my case if I need to bring water I try to get water closer.
As I have 42 gallon fw capacity plus 10 gallon water heater which adds 433 additional pounds!

Not yet have I not found water closer.
In almost every scenario the cg had fw upon entering.

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Old 09-04-2013, 06:51 AM   #8
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Thanks for the info, I thought maybe it would be extra hard on the tank straps and wear out faster.
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Old 09-04-2013, 07:11 AM   #9
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If we are going boon-docking then our 60 gallon tank will be full to travel with. When traveling then we put in about a 1/3 of a tank for pit stops between campgrounds. When we had a toyhauler it was filled with 110 gallons of water. No problems......yet, while knocking on my head.
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Old 09-04-2013, 07:14 AM   #10
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Something else to consider is if the tank is not completely full the water will be sloshing around. That means the weight of the water is jarring itself back and forth inside the tank. Doing this can cause damage to the tank, straps and sensors. Also if the water is sloshing it's weight back and forth as you slow and accelerate that will be a force that can work its way to the TV. Though in some scenarios this may not be severe, others it may. As for Epedydad's, knowing he pulls a BIG 5er with a dually the (guessing) 20-30 gallons of his half tank of water isn't going to play much into that as everything else around it is so large and heavy! Lighter rigs will notice this affect more so.


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