Responded to emergency service call for gas odor after a boiler installation. Identified and repaired a significant gas leak at the incoming line where the flare connection to regulator was damaged. Cut out compromised section, replaced flare fitting, and pressure tested all accessible connections to verify system integrity. Relit boiler, water heater, dryer, stove, and fireplace after confirming no additional leaks. Advised customer to continue ventilating the area to dissipate residual gas odor.