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Re: External fuel tank air vent
When stored, you keep the tank vent closed to prevent the absorption of atmospheric water into the fuel; keep the tank in a shaded place out of the sun to lessen the build-up of tank pressure.
Long term heat/pressure build up inside these rotomolded ext. tanks will eventually destroy the tank .... @ ~$70.00 per 3 gal tank. If you store these on deck, get or make a 'suncover' to help shade them, etc.
Best is to not long term store any fuel in these 3 gal. tanks; but rather, dump the unused fuel into your automobile and store the tank empty and with the vent valve open. Gasoline only has a shelf life of 30-45 days without stabilizer, a little bit longer with stabilizer. Empty tanks dont need stabilizer.
Last edited by RichH; 09-27-2012 at 03:02 PM.