I used rubber 1/4 fuel line all the way from the tank to the canister. I just used some of the insulated hose holder/clips they supply with the kit. The 3/16 rivits work well to hold the clips on. Just ran them along with the fuel lines along the 4" tube. It is the 'lowest' of the lines. I thought if something was to bump the ground I would want to sacrifice a vent line before a fuel line which are mounted up as high as possible.