joshuajim wrote:
Just a thought, but does the regulator self adjust pressure as altitude changes, i.e. remain steady at 11" regardless of altitude? It would seem that as barometric pressure on the diaphram reduces at altitude that the w.c. would increase.
I suspect the regulator is always holding 11" WC
relative to atmospheric pressure. The absolute pressure of the LP would necessarily decrease but that makes sense if you want to keep a balanced mixture of air/fuel at the appliances.
The movement of the diaphragm is what causes the regulator to alter the internal gas pressure.