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x2 for the Outback Accessories tank. I've applied the KISS principle and opted for a tank that doesn't have a pump. Don't have to carry a spare. I'm not too sure as to whether you can have a one way valve fitted but if you split your main tank you're still in the manure but with some fuel I guess.
I've got the Outback Accessories tank as well, and the only problem I see after having just completed a 5K trip, is not being able to see how much fuel is in the OA tank at any given time.
You could of course be anal about keeping track of Klms done on the way, but I'm not like that [bighmmm],,, I'd much rather just look at a gauge and "know".
Not sure how I'll go about it, but I'll look at getting a gauge fitted at some point,,,, maybe [bigwhistle]
The gauge on my LRA tank shows as constantly empty so its next to useless. I just remember how many transfers I've made into the main tank and I have a rough idea in my head of how much fuel in is there
I never worry how much fuel is in the Outback Accessories tank on mine. I look at the gauge, and if it is showing full, I know that I still have at least something like 800km range. If it is not showing full, then it is no different to driving a standard vehicle and you re-fill when the gauge tells you it is necessary to.
On long trips, I fill both tanks up and know that I will get somewhere approaching 1,000km before the fuel gauge starts to move - has always worked exactly as I expect it to. [biggrin]
I have used a OA long range tank for 7 years without any issues. I always reset the trip meter when filling the tanks. Generally I have found that about 900km is covered before the main tank gauge begins to move. This range seems to be similar to other users.
When running the vehicle for many hours/kms the gravity feed between tanks may be slightly slower than the draw from the main tank and the gauge will begin to drop prematurely (wrt the expected kms). Stop for lunch or drive down hill and gravity will do its job.
I believe that as the "Head Pressure" in the auxillary tank decreases the transfer rate decreases. Maybe the hydraulic engineers out there can correct me!!
This was really disconcerting the first time it happened because I thought there must be a leak in the system. Just something to be aware of.