Response to Hello Roger, The B848 1 HP Standard Motor - Full Rate (B2848) will replace your current A.O. Smith motor. The 177475-20 comes up as a 1 hp full-rate or 1.5hp up-rate. This 1 hp full rate has a total HP of 1.65 which makes it identical to a 1hp up-rate. This motor can be used on a superflo with no problems.

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