Response to Hello Kristen.  The Century Motors V-Green 1.65 HP Variable Speed Motor model ECM16SQU is a compatible replacement motor for the Hayward TriStar 1.0 HP Full Rate Pool Pump.  V-Green 1.65 HP Square Flange 48Y Variable Speed Motor - ECM16SQU  It is recommended that the motor shaft seal, seal plate gasket and diffuser o-ring be replaced concurrent with the new motor.  The GOKIT81 contains the necessary parts to complete this project.   GOKIT81

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