We recently purchased an Outland Premium Fire Bowl from Costco and rather than connecting it directly to a propane bottle, I bought the pictured hose from Amazon for $17.99 and it works perfectly with no leaks. Since the propane bottles on the trailer that feed the Lance provided propane quick connect outlet have safety regulators, you do not need the regulator on the hose provided with the Outland Fire Bowl.
It is an easy conversion with the new hose that has a 1/4" male quick connect on one end and a 3/8" female flare fitting on the other end. Simply disconnect the Outland supplied hose and connect the new hose to the fire bowl. You do not use thread tape or pipe dope when connecting a female flare fitting.
I leak tested the quick connect end and the flare fitting end multiple times before trying to fire up the bowl. When I did fire up the bowl it took a couple of tries because the air in the hose had to be purged.
IMPORTANT. When making the Quick Connect connection, be sure to pull on the male connection on the hose to be sure it is firmly seated in the female quick connect. There is and on/off valve that has to be turned on the side of the female quick connect on the trailer.
DOZYANT 12 FT RV Propane Quick Connect Hose for RV to Grill, BBQ Quick Release LP Gas Line for Camp Chef Stove, Pit Boss Burner - 3/8 Female Flare Fitting x 1/4 Full Flow Male Plug $17.99 with 2 day delivery on Prime.