Use this Extension to stack any Fuel Pack on top of the 3 Gallon RotopaX, 3.5 FuelpaX, or 4.5 FuelpaX. Use the standard Extension if stacking the 3 Gallon on top of a 1, 2, or 4 Gallon Fuel Pack.
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Exactly what I ordered
Orlin · August 13, 2026
Not happy unfortunately. I was excited to stack my 3gallons on my Leitner rack but no where in the description did it mention it will free spin. So for anyone looking to buy. Only buy if you plan on mounting the tanks where they touch the surface. If they are not touching a surface they can be stolen.