My water heater in the basement took a bath due to spring rains. The pilot wouldn't remain lit even after replacing the thormocouple so I had the whole thermostat/gas valve (propane) changed. It fired right up. But I would like to know something more.
The old unit Unitrol had a larg red knob on top with a green cap on top with a screwdriver slot and it says main gas pressure, by which I assume that the amount of gas going to the main burner could be adjusted. The new control a bradford white doesn't have that feature. The diagram that came with it shows a "gas port" on the bottom of the unit. I looked and its something to be opened aparprently with a star screw driver. Is this a main gas pressure adjustment as on the unitrol? or is this just a place to attach a pressure gauge?