How do you get air out of water pipes?

How do you get air out of water pipes?You open the uppermost faucet and bleed the system. I need more information Pump or city water? Air in both hot and cold watere? If you're on a pump describe your system. Back to you, Tom

Yeah, your question doesn't give us any information to work with. Exactly what is the issue that makes you think there is air in the system? Describe as much as you can about the problem and we'll see what we can tell you, OK?

Mark