My Cart

Fire Water Pump 1 1_2 inch Honda Gas

High pressure Fire / Irrigation
Model Number
Koshin SEH-40H Fire Water Pump 1 1/2 inch Honda Gas

Koshin SEH-40H

Fire, Flooding Pump, firefighting or high pressure. Honda engine Water Pump 1-1/2 inch SEH-40. All aluminum die cast pump housing, with Cast Iron impeller and volute for lightweight, portability while durable wear parts. Metal Carry handle and base. Honda GXH50 4-cycle engine. 4-Cycle engine so NO mixing gas. Use standard automotive gasoline. Also often use in oil spills as a oil skimmer pump. Portable Damage Control CGP1 Pump or Wildfire Hot Tub pump.

Honda powered fire pump for home firefighting, irrigation, gold dredging or construction and industrial dewatering. Utilities, manhole and vault draining, marine, Landscape irrigation, mobile plant watering. The high pressure is adequate for fire fighting and acts as a First Response when needed to protect your property. Grass fires, brush fires, out of control burn piles can happen, having a portable high pressure pump on hand helps to control the fire spread. This High Pressure Water Pump can pump directly from your stream / pond / pool and provide high pressure to help fight fires. USDA Forest Service approved spark arrester. Great as a flat roof pump. Also see LSR2.4S roof pumping kit.

  • Pressures that can exceed 3x Higher than Centrifugal Pumps
  • Impellers and Volutes are Constructed of Cast Iron for Durability, and Long Operating Life
  • Pump Housings are Made of Die Cast Aluminum for Strength, Weight Reduction, and Portability

Honda engine is 49cc, .05 ga. gas tank providing .83 Hrs run time firefighting. Honda engine Includes low oil sensor.

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. Established in 1948 Koshin history is one of technical innovations and being a leader in specialized pump manufacturing.

It also features and amazing 141 feet of head capabilities and over 4000 gallons an hour. This is a great pump for portable sprinkler systems.
Series: Fire High Pressure Pumps Gas 

Also used in prairie dog, ground squirrel burrow hole filling with sand water mixture consult PumpBiz application specialist. Replace wh15x. Gasoline Lavatory service cart pump.

More Information
Model Number SEH-40H
Series Portable Water Pump Gas
Max Flow (GPM.) 73
Max Flow GPH 4380
TDH Maximum (Ft) 141
TDH Maximum (PSI) 61
Horse Power (HP) 2
Horsepower (IE .5, 1, 1.5, 20) 2.2000
Inlet Connection Type MNPT
inlet size 1 ½"
Inlet (In.) 1.5
Outlet Connection Type MNPT
Outlet (In.) 1.5
Wetted Materials Aluminum, Cast 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 Carbon-ceramic
Mechanical Seal Type Single
Other 16''x13''x18''
Low Oil Shutdown Yes
Impeller Material Cast Iron, semi-open
Duty Continuous
Drain Yes
Port Rotation Yes
Country of Manufacture Japan
Weight (Lbs) 26.000000
UPC 4971770125438
Warranty (YRS.) 3
GPM Of Water At 40 Feet Of Head 68
GPM Of Water At 60 Feet Of Head 60
GPM Of Water At 80 Feet Of Head 35
GPM Of Water At 100 Feet Of Head 30

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: can I deadhead this pump, ie shut off the flow and keep the motor running?
A: Yes you can, ideally for only several minutes. The water will heat up due to friction. Keep water moving, use a bypass vale.

Q: Will this connect directly to a NH (fire hose, NST, NFHT) 1.5"?
A: No - Male Pipe threads NPT NPSH. There are simple adapters that go from 1.5" NPT to 1.5" NH. We use them all the time because we work with forest service as well as general contractors who use NPT.

Q: Can this pump produce at least 20 gpm at 115 psi?
A: No. They are excellent portable pumps but 115 psi is totally maxed out and does not provide 20 gpm. It would easily do it at 80 psi. See the performance chart image. PSI x 2.31 = Feet Head of water. Performance charts are show in FT of Head (TDH).