Fresh Water Holding Tank?

I am looking to add a potable water holding tank to my W900L. I drink reverse osmosis water which I produce at home, and it is getting really old filling up jugs for my trips. So I figured I would see if anyone has some ideas for adding a water storage tank to the truck. I would like to maybe put it under the bunk so it doesn't freeze in the winter, and plumb a small 12v pump system on it. Any ideas where I could find a hard tank (not a bladder) and the gear to do this? It'd be nice if the pump also works in reverse so I can fill the tank without trying to pour it in and spill it all over the bunk heater, etc.

40 gals. would be great. I drink about a gallon a day so that would be plenty for drinking and cooking while out for 3-4 weeks.

I wonder if an RV store could install one for me?

Thanks for any ideas.

 

I wonder if those flojets have a decent warranty. I'll check with a local RV store or boat supply and see if they can do it, that way I'll have a point of contact for warranty issues if needed.

 

Looks like this tank will fit in the channel at the rear of the bunk storage and might even slide in and out via the side box doors.

http://www.plastic-mart.com/product/565/32-gallon-rv-water-tank-rv69w

32 gals, and since there is a 12v dc bus already under there it should wire up pretty easily. Just need to figure out how to fill it.

 

Hmmm interesting. I do have a webasto bunk heater under there that will keep the air circulating, and the hot end dumps out low at the base of the bunk into the sleeper which might help, too.

Oh Vito I was talking about the DC bus already under the bunk, not already on the tank.

STexan thanks for pointing out the odor issue. I usually transfer the water into milk jugs and haven't noticed a taste, but I wonder if the new plastic tank will be different. Maybe if I pre-treat the water with some baking soda to balance the PH, it might also help the odor?