How do you change level vials?

How do you change level vials? Knock the old vials out of the notches (there may be slight adhesive on there, but just scrape that off). Press the new vials into the notches. You may have to turn them slightly to adjust. Press the rubber bezel and window back on.

Can you replace level vials? Typically, I-beam levels have vials that are snapped into the frame. If the this type of level vial needs replacing, it can be done easily and with the same accuracy as when the level was new by simply removing the old vial and replacing it with a new one.