Thank you Marty.
I have an oven I need to drop down to either 4" or 5" W.C. according to the manual. It actually says 5" on the oven, and 4" on the manual. I think coming off the meter is more like 7" and there is obviously too much pressure judging by the burner flame.
What I can't understand is the difference between these 2 Maxitrol regulators.
One is 2X the price, and one says "Max load: 40,000 BTU/h" but the "capacity" of 250,000 BTU/h. I am not sure the difference between capacity and load. The oven will use 60,000 BTU/h. One is a poppet and other is straight through flow.
It sounds like I may need the pricier one?