I've got a NG line on my back patio and thought I'd try out converting one of the bayou classic burners. I do get a little soot but there's plenty of heat and can bring 3 gallons to a boil in about 20 mins.
I saw a lot of questions on this subject when I was researching it but no real how to's. To make it easier for anyone else I figured I'd put all the required mats in one place.
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My home's gas line had a 1/2" female connection which I believe is pretty standard so I included the reducer with the rest of the stuff. You may not need that part. You might also be able to get away without the Needle Valve if your line already has an adjustable valve on it.
The setup is pretty simple. just make the connections in this order and tape any with threads.
Gas Line --> Reducer --> Needle Valve --> 10ft Hose --> drilled orifice (included with burner) --> burner
The only special step was drilling the orifice. The orifice is the little brass adapter that comes with the burner and that just needed to be drilled out to 1/8". Which was easy enough to do with a drill and a pair of Vice Grips. Just start with a small drill bit and work your way up. PS. wear eye protection when doing this!
good luck!