Are interior meter connections for CSST allowed?

• A. Allowed
• B. Not allowed
• C. Only with permit
• D. Only for propane

Answer: (A)

Interior CSST installations, including connections inside the building at the gas meter, are allowed as long as the system is installed in accordance with the CSST manufacturer’s instructions and the electrical bonding requirements. The key safety requirement is bonding the CSST gas piping to the building’s electrical grounding system (typically with a clamp on the piping or a fitting near the service and a conductor no smaller than #6 copper), which helps prevent damage from lightning and stray surges. Beyond bonding, follow the manufacturer’s installation guidance for securing, protecting from physical damage, and using appropriate fittings. This is why interior connections aren’t prohibited or limited to permits or propane; they’re permitted when installed correctly.