A compressor assembly including a housing that encloses a sealed interior volume and defines an inlet opening and an outlet opening. Refrigerant is communicated from a suction line into the interior volume through the inlet opening. Refrigerant is communicated from the interior volume to a discharge line through the outlet opening. A first compressor mechanism is disposed within the interior volume and is adapted to compress the refrigerant. A first fitting is mounted on an exterior surface of the housing and is in communication with one of the inlet and outlet openings. The first fitting defines a first passageway for communicating the refrigerant between the one opening and a respective one of the suction and discharge refrigerant lines. The fitting further defines a first duct in communication with the first passageway. A first pressure relief valve is mounted in communication with the first duct.