NG pressure / flow question

I had a 1/2" line split from my main supply in the garage that runs into my indoor fireplace (which is rarely used). I plan on heating my garage this winter, so I tee'd off a stick to that, as well as ran a 20' length to the opening of my garage doors so that it could feed my burner that I use to make beer. It's a pretty large burner, rated with propane and a 30psi reg. up to 200k btu. Amazon.com : Bayou Classic BG14 Banjo Burner 10 inch diameter : Grill Parts : Patio, Lawn & Garden (http://www.amazon.com/Bayou-Classic-BG14-Burner-diameter/dp/B0009JXYTG) That being said, I was using just that setup before I ran these pipes, and it would heat my 26 gallon kettle to a rolling boil pretty easily. I bought this to convert the burner to NG, but do not have a regulator (which I was under the impression that you didn't need, although in the directions it says something about a reg): HURRICANE NATURAL GAS CONVERSION VALVE | William's Brewing (http://www.williamsbrewing.com/HURRICANE-NATURAL-GAS-CONVERSION-VALVE-P2214.aspx)