If you purchased your pump after 10/2000, the label on the pump will show a "B" after the model number. Any replacement impeller you purchase should be in the "B" Series impeller for your model.
hydroponic gardening. Motor is epoxy filled, preventing the possibility of water getting in, or oil from leaching into the pond. One-year warranty on impeller and three-year manufacturer warranty on motor. Pumps include: base, pre-filter,18 foot grounded cord, and sponge pre-filter. Model Maxgph Fittingsin