A manifold gauge cover featuring a first half shell and a second half shell connected via a hinge. The inner surfaces of the shells are lined with foam. The shells can move between an open position and a closed position respectively allowing and preventing access to the inner cavities of the shells. A locking mechanism secures the shells in the closed position. A gauge aperture is disposed in the back surfaces of the shells to allows passage of the hook of a manifold gauge set. A magnet is disposed on the bottom surface of a shell. A chart holder is disposed on the top surface of a shell adapted to hold a pressure temperature chart. When the half shells are in the closed position, the half shells cover a portion of a manifold gauge set.