Honda NZ Approved

2″ Semi-Trash Pump

The Koshin STH-50X semi-trash pump delivers 600 Litres per minute and 29M head.


For demanding construction and agricultural water removal applications where small abrasive material, stones and sand may cause premature wear on centrifugal pumps, Koshin offers 2″ and 3″ semi-trash units. Deeper cast steel impeller vanes coupled with a large volute discharge opening allow Koshin’s semi-trash pumps to pass water containing particulate matter and small solid objects without clogging the passage. These self-priming construction pumps feature a tough silicone-carbide mechanical seal and a quick clean-out port for easy maintenance and long service life.

The STH-50X is used New Zealand-wide by some of the largest construction and rental companies in the industry.


Diameter2" / 25mm
Total head29M
EngineHonda GX120 4 stroke recoil start


  • Cast alloy pump body
  • Cast steel impellor and volute
  • Recoil start
  • C/w
  • Carbon mechanical seal
  • Roll bar frame
  • Hose fitting and strainer

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