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Sorry, Newaukumdon, but I believe you are misinformed.

From my reading on the subject, the water column pressure can be tested on the gas (natural, not propane) valve by way of 2 screws (A and B)...

I just ordered a new gas valve for my fireplace. I damaged my old one by blowing compressed air into it to remove spiders that had found their way in through the gas orifice to the burner.
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