How do I properly connect the air/gas supply to the Spectrum 375?

Use only clean, dry air with 90 to 120 psi (621 to 827 kPa) pressure. Obtain a hose with 1/4 NPT right-hand thread fitting, wrap the threads with teflon tape or apply pipe sealant, and install the fitting in the gas/air inlet opening. Route the hose to your gas/air supply. Ensure that all connections are properly assigned and tightened, and verify that correct air pressure and airflow are set to prevent torch overheating. (Page 15)