Hold on here.. Since this is a beginners forum, and a lot of beginners refer to our fuel as "gas", it is NOT gasoline, it's alcohol (ethanol and nitro-methane plus a blend of oils). If the OP IS talking about gasoline... petrol... petroleum based fuels, then ok.

I am not quite sure how the plastic would do in a fuel (ethanol) tank, if it would decompose it or not, but I doubt it. For Gasoline, however, it does strange things to certain materials, so I would be very careful using plastic zip-ties in any fuel tank.

A twisted copper wire works, as does a good tight fitting glow fuel tubing around the barbed clunk feed tube without anything else. There are differences in tubing material for gasoline and glow fuel (ethanol based fuels).

CGr.