Yes, reason being most of the salesclerks there and at HD are just kids. I know one, a friend's son who is graduating high school this month. He's been there 2 years in the paint dept. They are just clerks, maybe to help you find something, but not skilled to offer any advise. If you are lucky enough to get someone retired from an occupation that is a real treat and a rare, find. Someone who knows what you are talking about. It is not the fault of the kids or clerks, they are just doing their jobs, it is not to be expected they know about what an expansion tank does. Most won't even know what one looks like. And, that is okay. Imagine if the kids/clerks know about everything in that big store, why would they be working there at such a young age? They should be out in the field working or having their own business not making miminum wage. Just commonsense. I don't expect much help when I get there, lol, so I bone up on what I need to know, before I enter it.