When should an additional regulator be installed in a fuel gas system?

Installing an additional regulator in a fuel gas system is necessary when the system pressure exceeds the appliance's design limits. This is crucial because appliances are designed to operate within specific pressure parameters. If the pressure exceeds these limits, it can lead to malfunctioning of the appliance, safety hazards, or potential damage to the equipment. An additional regulator helps to ensure that the pressure is appropriately reduced to a safe level that aligns with the manufacturer's specifications for the appliance.

The choice related to outdated appliances does not directly address the immediate need for regulatory pressure management. While maintenance accessibility is important for ongoing safety and performance, it is irrelevant to the decision about requiring additional pressure regulation. Having multiple appliances connected also does not inherently require the installation of an extra regulator unless the combined pressure demand exceeds the safety limits for the existing system. Thus, ensuring that the compressor or appliances operate within their respective designed pressures is the primary function of adding an additional regulator to a fuel gas system.