Response to Hello Dale.  Century Motors 1.5 HP Up Rate Motor model B2854 is compatible with the Pentair Whisperflo models WFE-26 and WF-26.  Century Motors 1.5 Full Rate Motor model B2842 is compatible with the Pentair Whisperflo models WFE-6 and WF-6.  A check of the pump housing label will identify which Pentair Whisperflo model you have.  It is recommended that the motor shaft seal, seal plate gasket, and diffuser o-ring be replaced at the same time.  The GOKIT32 contains all the parts to complete this project.   Tune Up Kit Pentair/Purex Whisperflo - GOKIT32   Century 1.5 HP Square Flange 56Y Full Rate EE Motor - B2842

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