I didn't realize it when I bought it, but the ports on mine have been plugged by the previous owner since I owned it. I don't have a problem with that, but noticed it when I was taking the AC system off to throw it out. The larger rubber rubber hose was dry rotted, and fell off. I just put a new piece of hose on it. It had just passed inspection, but since it is a pre-1996 it is emissions exempt in Pennsylvania. No harm no foul.