Waterway Plastics Center Discharge Pump Impeller, 2hp
Mfg Part No 310-5200 

-2 Horsepower
-"E" Stamped inside of impeller and sometimes a white mark
-Use with the older style Waterway Center Discharge wet end Part No. 310-1141

Other Numbers on this impeller: ASSY #S 310-5140 310-5200 CENTER DISCHARGE D & E 313-1140
310-5200 is a 2hp with the letter E stamped inside and sometimes a white mark in the center of the impeller
310-5140 is a 1.5hp with the letter D stamped inside and sometimes a yellow mark in the center of the impeller