The KOSHIN STH-50X is a rugged 2" (50 mm) semi-trash petrol pump engineered for high-abrasion dirty water, dewatering and general water transfer. Built around a reliable Honda GX120 four-stroke engine, the STH-50X delivers up to ~600 L/min (≈158 GPM) with a maximum head of 29 m (95 ft) and a guaranteed suction lift up to 8 m (26 ft), making it ideal for irrigation, construction, municipal and emergency dewatering jobs.

Key features

• Silicon carbide (SiC x SiC) mechanical seal for superior abrasive resistance and long life.
• Spheroidal graphite (FCD450) cast iron impeller and volute for high erosion resistance.
• Die-cast aluminum pump housing and powder-coated roll cage for corrosion resistance and portability.
• Easy impeller removal and long-bolt assembly for quick maintenance.
• Includes strainer, hose couplings and basic tool kit for fast deployment.

These design choices prioritize durability and serviceability when pumping sandy, muddy or debris-laden water.

Technical highlights

• Suction / Discharge: 50 mm (2") NPT / Outer pipe thread
• Max flow: ~570–600 L/min (≈158 GPM)
• Max total head: 29 m (95 ft) · Max suction lift: 8 m (26 ft)
• Engine: Honda GX120, ~118–122 cc, 2.1 kW (2.9 PS) @ 3600 rpm
• Max solids: up to ~8 mm
• Net weight: ~23 kg (51 lbs)

Applications: dirty water pumping, site dewatering, irrigation, flood response, trench and basement pumping, agricultural water transfer.