speaking of pressure regulators, here, there is normally one just before the gas meter.
It is vented to the outside to be able to sense the ambient barometric atmoshperic pressure.
My understanding is that this pressure regulator serves two funtions:
1- To greatly reduce the pressure found in the street mains.
2- To slightly adjust the allowable pressure in the home's gas piping. This is meant to reduce the flow via a pressure asjustment when the barometcic air pressure is low and raise it when it is higher. This aims to keep the flame size (via the pressure) the same despite the weather.
There was once an accident in Boston where such high pressure gas reached the meter that it blew out the pressure regulators and pilot lights became a yard/meter tall. Quite a few buildng burned down! Of course the flexible connectors are not meant for such pressure and popped as well!
It is vented to the outside to be able to sense the ambient barometric atmoshperic pressure.
My understanding is that this pressure regulator serves two funtions:
1- To greatly reduce the pressure found in the street mains.
2- To slightly adjust the allowable pressure in the home's gas piping. This is meant to reduce the flow via a pressure asjustment when the barometcic air pressure is low and raise it when it is higher. This aims to keep the flame size (via the pressure) the same despite the weather.
There was once an accident in Boston where such high pressure gas reached the meter that it blew out the pressure regulators and pilot lights became a yard/meter tall. Quite a few buildng burned down! Of course the flexible connectors are not meant for such pressure and popped as well!