I guaranteed the tank 100%, that means if you found something you aren't happy with you get your money back. I will send you a UPS return label, that way it costs you nothing to ship it back to me. I will pull your cc number and refund your charges 100% on return of the tank. When we pulled it off the machine it had no leaks, but hey anything can happen. I'll patch it and put it on one of my rental.
I wouldn't have wasted my time and money if I thought it leaked. It is costing me $28 to return the tank to my shop, not to mention the shipping and packaging costs to ship it to you. So please return the tank with the UPS label that is being sent to you.