Abstract: A tool for maintaining and servicing a pressurized refrigeration system or the like wherein it is desirable to remove and replace a threaded check valve core without depressurizing the system. The tool includes a body member having a longitudinal passageway extending therethrough with means to provide sealing communication between one end of the passageway with the fitting in which the check valve is fitted. A removable cap sealingly engages the opposite end of the longitudinal passageway with an operating shaft extending therethrough for axial and rotary movement within the passageway. An annular sliding seal is disposed between the shaft and the removable cap. The shaft includes engaging means formed on one end thereof for releasably engaging the valve core to unthread and remove it from the fitting and withdraw it into the passageway to a position adjacent to the removable cap.

Abstract: An improved apparatus for securing an externally threaded line tap valve to the exterior of a penetrable tubing line such as that found in a closed refrigeration system. The apparatus is adapted to secure a line tap valve to a line having any of a plurality of outside diameters. The apparatus includes a body member having a threaded passage extending therethrough and a substantially square lateral cross-section. A first cylindrical outer surface is formed adjacent one end face of the body member and a second cylindrical outer surface is formed intermediate the first cylindrical outer surface and the opposite end face of the body member.