On Jul 6, 3:41*pm, "The Post Quartermaster"
wrote:
I was told that one must use different size flexible hose for
different appliances. We're talking propane, and I guess it would be
the same for natural gas.

snip

Flow rates are vastly different for the two gasses. For a given BTU
output, the propane unit will have much smaller orifices. From a
practical standpoint, most any connector decently sized for NG will be
more than adequate for propane. You're good to go.

Joe