Atlas engineering company is the manufacturer of an array of quick couplers. Atlas offers tube couplings/couplers which can be used to connect pressure or vacuum lines to plain end tubes and pipes. The coupling is easily pushed over the end of the tube and pressed firmly to the stop position. This provides an affective leak-proof sealing. The tube coupling can be disconnected merely by pressing down the lever. The couplings are used for alternate pressure testing, vacuum, dehydrating or charging or refrigerants. Tube couplings/couplers are applicable for pressure, vacuum line, connections to tubes and pipes used with refrigeration coils for changing refrigerant, refrigeration, leak testing of plain tubes and tanks. Salient features of tube couplings/couplers are as follows: