Where is the regulator vent located?

The regulator vent is specifically located on the atmospheric side of the regulator housing. This placement is crucial because the vent needs to be exposed to atmospheric pressure to accurately measure and regulate the pressure of the gas flowing through the system. By being on this side, the regulator can respond appropriately to changes in pressure, ensuring safe and efficient operation. If the vent were placed on the service line or at the burner inlet, it would not be able to function effectively, as it would be measuring gas pressure in a confined space rather than the external atmospheric pressure. Similarly, placing it on the fuel tank would not allow the regulator to accurately control the pressure needed for safe appliance operation, as the tank itself is designed to hold gas under pressure. Thus, the correct position of the vent is essential for proper regulation and safety in an LP-gas system.