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Water Pump 2 inch Semi-Trash

4-Cycle 4.7HP 10 000GPH
Model Number
15% Off Special Price $444.13 Regular Price $522.50
Water Pump 2 inch Semi-Trash

Koshin STV-50X

Semi-Trash Pump 2 inch, Koshin Pump with gas engine. STV-50X All aluminum die cast pump housing, with CI impeller and volute for lightweight and portability along with long-life internal parts. The Cast Iron impeller and volute are premium Spheroidal Graphite Cast Iron. This provides much greater wear resistance than ordinary and less expensive plain cast iron. Koshin is the ONLY pump manufacturer to use this high-grade material. Metal Carry handle and base. 4-Cycle engine so NO mixing gas. Use standard automotive gasoline. Silicon carbide SiC seals are 2 times harder, 15% tougher, and 50% stronger than common ceramic seals.

Compare to Honda-powered water semi-trash pumps for construction, golf course, and industrial dewatering. Utilities, manhole and vault draining, marine, Landscape irrigation, mobile plant watering.

.66 ga. gas tank providing 2.5 Hrs run time.

With great experience and over 40 years of tradition KOSHIN produces the highest quality water pumps. KOSHIN brand have been ranked no 1 in the world by numerous professionals.

Koshin Engine Includes low oil sensor. Sturdy steel roll cage included. Other 2" trash pumps

Do not be fooled by imitation "industrial" trash pumps sold elsewhere. The pump quality is not the same and as with any pump parts will be needed and PumpBiz stocks parts for all the pumps we sell and support. These are the same pumps used by many rental stores, so they have proven themselves many times over.

More Information
Model Number STV-50X
Series Semi-Trash Pump
Max Flow (GPM.) 158
Max Flow GPH 9480
TDH Maximum (Ft) 95
TDH Maximum (PSI) 41
Horse Power (HP) 3 1/2
Horsepower (IE .5, 1, 1.5, 20) 3.5000
Inlet Connection Type MNPT
inlet size 2"
Inlet (In.) 2
Outlet Connection Type MNPT
Outlet (In.) 2
Wetted Materials Aluminum, Ductile Iron
Elastomers / O-ring Buna-Nitrile
Motor Gas Engine
Speed (RPM.) 3450
Self Priming Yes
Suction Lift (FT.) 26
Max Operating Temperature (F) 120
Viscosity Cream 16.50 cp 100.00 ssu
Mechanical Seal Yes
Mechanical Seal Face SiC
Mechanical Seal Type Single
Other 18''x14''x15''. EPA and CARB Certified Engine
Low Oil Shutdown Yes
Impeller Material Spherodial Graphite Cast Iron, semi-open
Duty Continuous
Drain Yes
Port Rotation Yes
Country of Manufacture Japan
Weight (Lbs) 56.000000
UPC 4971770126275
Warranty (YRS.) 3
GPM Of Water At 30 Feet Of Head 130
GPM Of Water At 40 Feet Of Head 110
GPM Of Water At 50 Feet Of Head 100
GPM Of Water At 60 Feet Of Head 85
GPM Of Water At 70 Feet Of Head 70

Koshin pumps are the standard and known world wide in the contractor, rental, and portable pump markets as the brand to use. Most portable water pumps by Koshin feature Honda gas engines. Koshin manufactures a complete line of self priming centrifugal pumps for general transfer, high pressure and trash debris filled liquids. These pumps come in gas or diesel engine and single phase electric submersibles. Koshin is the most copied pump design coming out of China, but do not think they are the same. Use only the best, the original Koshin.

For over 70 years Koshin has continued to invest in new product testing and development. Koshin totally redesigned its production facilities in 2013 adding in house aluminum die casting, production automation, and state of the art process flow management. With a core philosophy of customer satisfaction, Koshin insures that each product off of its production line is of the finest quality. This is why we can proudly say that the performance specification found in this catalog are guaranteed minimum. This is often not the case with our competitors, who inflate actual performance values.

To further insure our valued customers that Koshin stands by our produces, we offer a 3 year limited warranty against manufactured defects. Our pumps are used and loved in 160 all over the world.

Koshin… the world’s toughest pump.


Q: Nice piece of equipment. Honda clone engine starts easy runs quiet. Did the job, easy priming, very satisfied. Who is the manufacturer Koshin?
A: Koshin Ltd is a World leader of all types of engine driven and electric water pumps. Being the hiqh qaulity mfr that they are known for in the rental industry, they are also the most copied by inferior brands. Koshin has its headquarters in Japan and operates a state-of-the-art robotic factory including their own metal foundry.