Part # 5221AX
By Century Motors
Part # 5221AX
Warranty 1 Year
Manufacturer Code B638
Alternate Part #'s 1-184948-22, 10-165118-04, 10-182259-04, 10-184948-22, 10-186085-20, 1203005400, 1203165400, 13-184948-22, 14449, 151962, 164719, 165118, 16511800, 177948, 18-184948-22, 181096, 181372, 181372PJ, 182259, 184948PJ, 186084, 186085, 52009, 8-165118-03, 8-165118-04, 8-181096-20, 8-184948-12, 8-184948-21, 816511806, 90101031, 90118571, C1437, CT1072, CT207CE, EB638, JD75FL1E, K48K2N100A1, K63CXDGG-5168, K63CXEPW-4765
A.O. Smith 3/4 HP Round Flange 56J Full Rate EE Motor - B638
Note: NOT California Title 20 Compliant.
California Title 20 Compliant Options:
What impeller size (3/4hp or 1hp) goes with B638 3/4 hp motor? Thanks,
The impeller part number will depend on the model of the front pump housing that the motor bolts to. You can call and provide that or if you are not sure than you can send us an image or two of the housing to firstname.lastname@example.org.
What is Service Factor?
Service Factor(SF) is a multiplier that when multiplied by the horsepower of the motor indicates the total permissible horsepower loading that may be carried when the motor is operating at rated voltage and frequency. The most important thing to remember when replacing a motor is that the replacement motor's horsepower times its service factor must be equal to or greater than the original motor's horsepower times its service factor. The Service Factor rating can be found on the motor label. See Step 4 of our How to Read a Pool Motor Label guide.