It depends on what ECO you are asking about. As far as the terms "air tower" go, this is usually a tall pipe tower with a large spring in the center so it could bend down to reach the tire. It also kept the hose from laying on the ground.
ECO Tireflator is what the Bennett Pump Company called their Model 90 Series meters (93, 97 & 98). If you are getting into air meters I probably have the largest collection of air meter literature. I also have written a book on air meters, it identifies over 450 air meters. For more information on air meters and ECO air meters go to this page of my website:
http://petrolianacollectibles.com/pc-1.htmFor information about my air meter book see this site:
http://petrolianacollectibles.com/announcement.htmFor information about my new Gas Pump Bible book go to:
www.gaspumpbible.comJack Sim