I have used it without problems though it will be 9 months after purchase. The thing which used last time was packing of the fitting mouth becoming ragged, sucked in, clogged inside the meter and overhauled, but this product can be used without such a thing. It would be best if you could provide a few extra packings first if possible.
Unfortunately we can not answer because the current use conditions are not available. In fact I think that things are certain. Anyway, I'm very satisfied with Mr. Monotaro's prompt and polite response and service spirit.