Discharge Pump Set TSB40-3AHanning pumps are compatible with the TSB40 3A discharge pump system as a complete. The discharge pump is small. Pipe Size: 3 4" MNPT 3 4" FNPT Discharge; 110 V Volts; 60 Hz Hertz Included are connectors for the discharge pump drain pipe, an exterior chrome button air on off switch, and a two minute timer. Features Compatibility: Designed to be compatible with Hanning pumps, providing reliable and efficient drainage for your pedicure spa. Compact