groran

I read somewhere as long as you hook the aux. tank hard (copper or metal tubing) to neck of factory tank you're ok. But some where else I read you can't, because of some DOT thing, what gives. This tank is probably stronger than factory tank & it's protected better than the factory tank being in the bed. I mean look at 18 wheeler, the tank is sitting on the side & looks like you could puncture it with an ice pick. I would love to hook an extra 100 gallons or so & fill up when diesel is cheaper at some places.

JD Dearden

Mine is plumbed in to the stock and it has a pump that keep the stock tank full.

puller

I have a tank in the bed. I think diesel is ok however gas is not in some states. I am sure some else will chime in here with some more help.

Puller

3500eh

mine is plumbed to the tank also. i've been told that up here in canada it is illegal to have aux tank plumbed in if truck is 04 or newer. also, supposedly, the dot is more likely to pull us over if they see aux tank, to see if it is dyed.

Festus

Never been pulled over with the one in my '98. Looking to find one for the Mega.

3500eh

never been pulled over either. i've just heard people say more likely to get pulled over. sure hope i never get pulled over. wonder if it is true though about it being illegal to plumb one in on 04 and newer?

RJOS

Gonna get the toolbox aux combo so smokey can't tell!!!

new2ctd

http://www.fmcsa.dot.gov/rules-regul...section=393.65

This is FMCSA section 393.65(d)
It is NOT illegal to gravity feed to your vehicles tank.

It is illegal to gravity feed directly to the motor.

groran

Take it with me & if ever questioned, I'll show it to DOT, thanks