KOSHIN STH-50X 2 INCH DIRTY WATER PUMP
High quality, self-priming, quality water pump ideal for water applications with dirt particles up to 8 mm.
- Maximum capacity: 600 L/min
- Maximum suction height: 8 meters
- Maximum total head: 29 meters
See product DESCRIPTION for more information.
– Guaranteed suction height of 8 meters*.
– Silicon carbide mechanical seal: 4-5 times more resistant than standard carbon ceramic mechanical seal.
– Ductile iron (FCD) for impeller & volute casing provides 10 times more erosion resistance than cast iron.
* At 0 m above sea level
Characteristics:
- Durability The housing of the Koshin STH-50X motor pump is made of an aluminium alloy. The material is not subject to corrosion, temperature influences or deformation, which increases the service life of the device.
- Efficient operation. The four-stroke engine with an output of 2.9 hp helps to pump 600 litres of liquid per minute.
- Reliability. The special metal frame protects the mechanism from damage and ensures stability.
Performance Curve:

Documentation:
* This link leads to the parts list of the model STH-50X-BCO. If the complete designation of your pump model differs from this, please ask us for the correct parts list via our contact form.
Technical information:
MODEL | STH-50X |
Connection diameter | 50 mm (2″) |
Connection thread | Outer pipe thread |
Total head | 29 m |
Delivery quantity | 600L/min |
Max. Suction height | 8 m (26 ft) |
Grain size | Max. 8 mm |
Mechanical Seal | SiC (silicon carbide) x SiC |
Impeller & volute casing | FCD450 |
Motor type | Air-cooled 4-stroke gasoline engine |
Motor | Honda GX120 |
Cubic capacity | 122ccm |
Rated power | 2.1 kW (2.9 PS) / 3600 rpm |
Max. Power | 2.4 kW (3.3 PS) / 3600 rpm |
Fuel | Gasoline, unleaded |
Capacity of the fuel tank | 2 L |
Continuous operating time | Approx. 2 hours. |
Start method | Rewind starter |
Standard accessories | 1 filter, 2 hose couplings, 3 hose clamps, 1 power tool set |
Weight, , net | 23 kg (50.7 lbs) |
Weight, gross | 25 kg (55.1 lbs) |
Dimensions L×W×H (cm) | 50 × 39.5 × 41.5 |
Performance:
A – Feed,
B – head,
C – Suction

*Performance may vary depending on conditions
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