djcjc wrote:
Anyone travel long distances with full water tanks or not a good idea?
We have traveled long distances with the fresh tank full. Not always but often. Our camper came with a steel cage supporting the fresh tank. This may have been unique to Sunline, but I am glad they did.
This is our current Sunline with an enclosed tank compartment. I also reworked the pump suction port from the side of the tank to be on the bottom. I can now draw the last quart out of the tank. This comes in real handy when bookdocking.
A few pics. Our current T-310SR with an enclosed tank compartment.
A partial pic, you can see the black metal frame under the white fresh tank. The fresh tank is right over the front axle. No change to TW.

The pump suction reworked. Both the drain and the suction port

A view of the bottom cage

Our prior Sunline, a T-2499. No enclosed tanks and the fresh tank was about half way between the front axle and the ball coupler. This added considerable TW. Added 200# to the TW. This cage frame setup is the same as our larger T-310SR just a better pic to see the frame. Also reworked the pump suction port to the bottom.


Both campers have a 42 gallon fresh water system.
Your note mentioned travel with "full tanks". Tanks being more then one. No one here yet talked about full black or gray tanks. In our case there is no way I would travel with full black or gray tanks long distances at full highways speeds. My tanks black and gray are ABS and held to the bottom of the camper floor joists (not the frame) with clips along the side. The center of these large surface area tanks are unsupported. The sag in the center of the tank when full tells me, no do not press my luck.
Something else not talked about is the change in loaded tongue weight with full tanks. This is a camper specific issue. If you have a several hundred pound TW increase or decrease this needs to be understood and compensated for. This reason alone may prevent some folks from being able to tow stable with a full fresh tank. And it may be worse with full black and gray at highways speeds. Around the campground to the dump station not an issue. Get out on the open road at speeds above 45mph and things change.
Hope this helps
John