Hello all. I rarely work with NG's but occasionally the deal is just too good to pass up. I clean them up and sell them but I do not hook them up due to the potential liability. Recently I sold a E 315 Gen II very nice grill and the buyer hooked it up. He said he had to scale down the fitting size from 1/2 to 3/8? He is reporting low flame.......thus I am assuming fuel flow issue. Ironically I just picked up another Gen II NG and dragged it home tonight. At $100 I figured worst case scenario I could use it to resolve the other NG grills issue. When loading it up I noticed what looked like a regulator at the connection point on the grill. I snapped a pic to show you guys. My question is.....do some NG's come with this box and some dont......or do they all need this unit? Is this unit the NG regulator? Can they work without one? I dont recall the old school NG's using this. Thank you