I have a spring water tank that feeds the house. It feeds through a pipe that is at the top taking overflow in. unfortunately this system is taking some air in as well, causing air locks. I want to close off the current overflow and install a new one going out to another tank. The problem is that the other tank is not low enough for the overflow pressure to make it. Is there a simple and inexpensive way to build water pressure without vertical feet?

A booster pump comes to mind, (see image) To check them out click on;PlumbingSupply.com - use these great booster pumps to boost water pressure (http://www.plumbingsupply.com/boosterpumps.html)
Or simply Google Booster Pumps and take your choice. Good luck, Tom