includes a cart 301 having a plurality of wheels 303 the cart 301 is configured to traverse along a set of rails 302 to move the pump 400 away from the furnace detector 62 can be a thermocouple or other temperature detector for detecting the temperature within the well at the location of the detector in some cases detector 62 is a duplex type k thermocouple with an open ended protection tube and ceramic bead insulators although any suitable thermocouple or other temperature detector may be used detector 62 could alternatively be a detector capable of detecting the presence of molten metal in the well by other means it can also be any other detector adapted to directly or indirectly detect a condition such as elevated temperature cessation of air flow conductivity which indicates the presence of molten metal change in moisture content of the air or any other parameter or condition capable of being monitored in some embodiments more than one detector 62 is used and in some cases more than one type of detector is used in one non limiting embodiment a thermocouple or other temperature detector is used as well as a detector capable of detecting the presence of molten metal by another means such as by measuring conductivity with a conduction probe in one non limiting embodiment one of the detectors may be part of a warrick u00ae conductivity system circuit that has liquid level sensing capabilities such as but not limited to warrick u00ae series.