Nat. gas is not hot as propane on a standard home gas line....Adding more openings only reduce flow pressure unless you have capacity...I used the one hole pipe cap on a 1 1/2 inch gas line and it worked just as good as propane....When the gas company swapped meters and went with standard gas line it worked ok for me but it will not equal the pressure of propane....I tried a cooking burner on nat. gas to boil and it sucked....It was actually a burner from a water heater....Cooked great....Took forever to boil....If you already have a pipe cap on your propane just get a cap and drill a bigger hole and you still have the one for propane if you not happy with it....Just reduce or upsize the pipe for the hose...
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