What is the difference in 48Y or 56Y? Both have the same size square flange.The item "3/4 HP 2-Speed 56Y Frame 115V Square Flange Pool Motor Century # B2981" is in sale since Sunday, April 14, 2013. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Pumps". The seller is "electric-motor-warehouse1" and is located in Corunna, Michigan. This item can be shipped to United States, Canada.