Using this Harris 25GX acetylene regulator is easy. First, connect the inlet to your acetylene source using the CGA 510 connection. Then, connect the outlet to your equipment with the 9/16' - 18 LH connection. You can adjust the pressure with the ABS plastic knob for precise control. Remember, the maximum inlet pressure should not exceed 500 PSIG. When not in use, keep it in a dry place. For maintenance, check the gauges regularly to make sure they're working well. Clean the regulator occasionally to prevent any dirt or debris from getting in. Also, consider using the recommended gauge guards for extra protection. And since it has a 7 - year warranty, if you run into any issues, you're covered.