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The Tank is filled with an OIL based fuel... I have seen 15 year old tanks that look brand new inside. Trust me...Transfer flow they hold up to all kinds of crap. Here is the big thing you must remember You are running the F450 and you fall under the DOT rules... the Transfer flow is DOT certified... If you get stopped by Highway Patrol or DOT and you have a Non-DOT tank will they get you to sign on the dotted line, or tell you to unhook the thing and drain the fuel? For me there is no Question on what to order and install.
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I agree, I don't know how people can think it will rust, I suppose unless you ran with it only having a few gallons in it for a couple years,,and much moisture collected, (Um anyone ever see aluminum exposed to the elements? May not rust, but oxidization would be nasty too...
I love my TF system, but after reading about this one, I would love the 98gal one, It is substantially lower in cost than TF, and seems the tool box area is a bit larger, and I like where the filler neck is as compared to the TF. Also I kind of like the idea of being able to flip between tanks, since ONE TIME, The TF system stranded me for a bit. (Mind you I am not paranoid, or worried terribly about it, seems to have been a one time glitch) But I watch my levels more now... The TF automatically transfers the fuel from the aux to the main. It was very late, and I look down to see my "TOTAL" fuel onboard, it said 22 gallons. (Low fuel light comes on with mine at about 35 gal left,,so I tend to ignore it now! LOL)
Anyway, a few minutes later I loose power, start chugging, and have to pull over, with a New Escalade, and something else on my trailer,,,not wanting to leave it setting along the road at 1am, right? My TF did not transfer anything for a while, I ran the main dry, with 22gal left in the aux.... /ubbthreads/images/graemlins/shrug.gif
As I said, this should not STOP anyone from their system, they said that it may be a programming problem for the module... my system is a few years old, it was in the truck when I bought it. The filler neck DOES have some rust present..
Even though they do not say DOT approved, I can't see why they wouldn't be, infact MARINE applications may be even stricter than the DOT ones, I don't know for sure.