I have used the adaptor for over five years with no problem. It is a very simple device that connects to your tank and then has a quick release connection that will fit the new high pressure (2000) pumps at commercial stations. It takes about 30-45 seconds to fill the average (scuba style) tank. My last fill-up cost me less than $3.00, I was paying $50.00 at marine stores. I will be glad to talk with you about it. My address is hssills@yahoo.com. Thaks