Response to Hello, Based on the model number, this would be the correct motor. As for the flange, if you look at you motor label, you will see an "FR" listed. If it is 56J, it is a round flange. If it is a 56Y or 48Y, it is a square flange. *Please note that this does not apply to an above ground pool pump with a Flex 48Y frame which is a round flange. 

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