Abstract: This invention provides a universal respiratory equipment cap which can be used to effectively block a number of different medical devices used in the respiratory care units of hospitals, EMT vehicles and the like. The cap has a small end and a large end, each with “blocks” or “plugs” of different diameters. A middle section has a flange which is tapered, thereby allowing for the blocking of additional diameters of tubes and devices. The flange creates two cavities into which anti-bacterial pads can be inserted to further enhance the effectiveness of the device.