An apparatus is provided for connecting and disconnecting a tubular fitting connector to a fluid conduit. A cradle assembly accommodates the fluid conduit, and includes a body having a first port and a second port. The first and second ports are disposed at opposite ends of the body, and each port is configured for receiving an end cap of the tubular fitting to fasten or unfasten the end cap for replacement. A connector holder is disposed between the first and second ports, and is configured for accommodating insertion of the connector. A holder assembly is provided for accommodating insertion of the tubular fitting. The cradle assembly is reciprocable relative to the holder assembly for transitioning the cradle assembly between a first position, a second position, and a third position.