Hi Andy, This motor will mount to your WFE-3 pump, however, the impeller for the WFE-3 pump will be too small to be used with this motor. I would recommend replacing your impeller with p/n 073129 or 073130 and also, get the Pentair/Purex Whisperflo Tune Up Kit p/n GOKIT32 or GOKIT32SALT.
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