Waterway .75 HP Hi-Flo Side Discharge Spa Pump Impeller "B" (310-3990) valveparts Designed for compatible internal inlet

Designed for compatible internal inlet fitting support

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

supporting better debris capture and steadier skimming action

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

Useful when original trap bodies are cracked or worn

Waterway .75 HP Hi-Flo Side Discharge Spa Pump Impeller "B" (310-3990) valveparts Designed for compatible internal inletThe 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