The pumps are the 53, 57, 151, 152, 153, and the model 48. If any of these pumps that have the 20' cords and if that cord has "phillippines" stamped on the plug, then there could be a grounding problem with the ground pin! If the plug has been cut off and the pump is hard wired, then there is no problem! There was around 2600 pumps affected by this. The pumps were made between 09/06 and 10/06.