Waterway .75 HP Hi-Flo Side Discharge Spa Pump Impeller "B" (310-3990) valveparts and WB skimmer applications where

and WB skimmer applications where the original plate has cracked

supporting better debris capture and steadier skimming action

Useful when original trap bodies are cracked or worn

higher-feature spa systems can lose some of the coordinated user access they depend on

Filter cartridge for compatible C-4440 and PSD40 spa and pool applications

Waterway .75 HP Hi-Flo Side Discharge Spa Pump Impeller "B" (310-3990) valveparts and WB skimmer applications whereThe Waterway 310 3990 impeller is designed for compatible . 75 HP Hi Flo side discharge spa pump applications and is identified as the B version. An impeller like this is useful because it restores the working water moving element of the pump while maintaining compatibility with the original version specific design. Version specific pump parts matter because even similar horsepower ratings may not use the same impeller. This Waterway part is a strong