Elevated tanks should be mounted on a sturdy, fire-resistant support placed on a firm, level surface. This structure should provide a safe way for climbing up to fill the tank and inspect the vent. The bottom opening should have the type of safety valve that will close automatically in response to heat from a fire, thus stopping further fuel flow. Also, the hose nozzle should have a self-closing valve for positive fuel shut-off to prevent dribbling and spills after use.
[Note -- Some states may have tank size and other restrictions for elevated gravity discharge tanks - check with local authorities.]
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