Very good points goose and BrewBama! I agree that a replacement is probably necessary as it is most likely an older tank. Refilling accuracy, however, is, in many cases, left to the person doing the filling and the past practice was to use a scale and fill until the proper weight is achieved. So over filling, and under filling, is commonplace with many tanks and while the date code on the tank determines its life span, many persons doing the filling aren’t properly trained and don’t even look at the date code. So, “good call” on the internal float valve regulation. I was not aware of this device!