I'm not sure if I post it at the right place, but it seems rather adequate... Since it's a copy/paste of a question I posted elsewhere it might be strangely worded... Bear with me...
We are finishing a Herms system and it seems our gas line is having trouble giving us a solid blue flame...
Here is our "High-to-low" pressure regulator. It is a modle normally made for house and it is written on it that can handle between 9 to 13 WC but is supposed to be set on providing 11WC. I'll update the info with the model numer later.