On Mon, 19 Apr 2004, Doug in Calif wrote:

> The guy at Suburban Propane said the double regulators will push the gas
> further but he said if its under 20ft the single reg will be fine.

I always thought the reason for the double regulator was
safety...something about keeping the full tank pressure from getting into
the vehicle if the regulator fails.  I may be remembering wrong, though,
or we may be talking about different things.