thanks for the warning. i'll see if OneGas has a responsive customer support web page.
i should have looked at the burner first. the regulator isn't made to be removed.
i'll go with a 20# to 1# adapter hose, since i normally carry a spare 20# on longer-duration trips.
I suggest you look again. You may be right, but propane regulators fail, and they need to be replaced. The most common setup is that the regulator has female thread on the appliance side and either a "close" nipple or a fitting on the appliance with male thread. There are exceptions to everything, of course.
When I did my mod, the first thing I needed to do was remove some "bodywork" on the grill to enable me to get at the regulator to remove it. If you aren't able to rotate the regulator to remove it, it's possible that some minor disassembly of the appliance will allow removal and replacement...or the mod...unless it one of those exceptions.
ONE OTHER VERY IMPORTANT POINT.
Some folks will run a propane fire pit off their AUX port.
This is possible, but it's a bad idea.
A propane fire pit burns at about 58,000 BTU/HR. This pretty much maxes out the flow rate through your regulator...AND the propane delivery rate of a conventional 20# or 30# tank. When I run my fire pit, ICE forms on the outside of the tank in summer in the very low humidity of the Colorado Rockies. The tank often freezes itself to the ground. The evaporation rate in the tank can barely keep up with demand. If you shop fire pits, you'll see that many, if not most, are rated at that magic 58,000 BTU...and that's why.
What's the big deal? If you want to run other propane appliances in the rig while running the fire pit off the AUX port, everything might starve for propane. Trying to make dinner while running the fire pit...your freezer fries might end up limp and nasty. In my case, we have an absorption fridge, and when boondocking it runs on propane. It doesn't use much fuel, but it gets unhappy if the propane pressure in the lines drops much...and it sounds an alarm. In spring and fall, we can see snow in CO, which means that we can be outside at the fire pit while the three pampered chihuahuas are inside with the furnace running. Our furnace is rated at 20,000 BTU. There ain't no way that the propane system can deliver 78,000 BTU. The furnace won't be happy, and the fire pit flame will be very low. Separate tank and regulator for the fire pit is essential.
So, technically you "can" run a fire pit off the AUX port, but I strongly recommend against it. Plus, one of the beauties of a portable propane fire pit is that it's, well, portable. I generally setup mine well beyond the reach of a 12' hose. Sometimes, but rarely, I'll have it under my awning, but usually it's under a pop-up canopy that might be 50 to 100 feet from the rig (we boondock, so we have lots more room than at an RV park). (And, yes, you CAN safely run a propane fire pit under an EZ-up or awning.)
That's kind of far afield from discussions about regulators, but then again, not.
