Honda Pumps


Why Choose a Honda Pump?

Powerful Honda 4-stroke engines

It all starts with the legendary Honda 4-stroke engine. Because let's face it, that's the heart of any pump. Durable Honda GX series commercial grade engines are easy starting and provide ample power for the toughest conditions.

Honda engines have long been recognized by the construction and rental industries as the leader in providing reliable, quiet, fuel-efficient power. And of course, our pumps are no exception.

Outstanding performance

Honda pumps don't skimp on the features you need to achieve superior performance. From durable silicon carbide seals to cast iron impellers and rigid mounted volutes, our pumps are designed to provide unsurpassed performance and durability in a variety of applications.

Unmatched quality and reliability

You want a pump that's going to be reliable, day in and day out. And with Honda, that's exactly what you get. Honda has a well-deserved reputation for reliability. Our pumps are designed to keep on going, year after year.

Honda Power Equipment offers pumps to meet a wide variety of applications. Use the chart and information below to select the right pump for your specific needs.

Pump chart

Chemical List

Chemical chart

Lightweight Pumps

The compact, lightweight and portable Honda's WX series pumps are an excellent choice for homeowners, gardeners, boat owners, and recreational users.


General Purpose Pumps

For general de-watering needs, Honda's popular WB series pumps offer the best features at a value price. These models offer commercial grade components like silicon carbide seals, anti-vibration mounts, and a fixed-mount cast iron volute and impeller.


High Pressure Pumps

The WH series are perfect for applications needing high pressure, such as sprinklers or nozzles. These pumps are lightweight and compact, making them highly portable. Possible applications include irrigation and fire suppression, as well as pumping over long distances.


Multi-Purpose, Chemical Pumps

Honda's WMP20X pump is designed for pumping a wide variety of industrial and agricultural chemicals in addition to clear water applications. View list of approved pumping applications. Above.


Trash Pumps

Honda Trash Pumps are the ultimate choice for contractors and rental applications. The WT series can handle solids up to 1 1/16” in diameter. These pumps are designed to move water, and lots of it – up to 433 gallons per minute. A quick clean out port and easy maintenance features help to ensure long service life.


Storage Tips

Flush the pump case with clean fresh water, then completely drain to prevent damage from freezing

Cover intake and discharge ports to prevent the entry of debris during storage

Self Priming

The term Self Priming is actually an industry term that describes the ability of a pump to create a partial vacuum by purging air from the intake hose and pump casing. All Honda pumps are self priming by definition. All self priming pumps require water to be added to the pump casing to start the priming process.

Priming Tips

Place the pump as close to the water source as possible. The less lift required will improve priming time

Fill the pump case completely with water (Never operate a centrifugal pump without water in the pump casing)

Start the pump engine.

By partially restricting the discharge hose, priming time can be improved

Shutting off a pump will allow water to flow out of the suction hose, requiring priming.

The use of a foot valve on the end of the suction hose will prevent water from flowing out of the suction hose if you stop the pump and reduce time required for the pump to regain its prime.

Wear off the volute and Impeller can decrease pump performance and increase time required to prime the pump. Regular inspection and maintenance of your pump will maintain peak performance

Pump Terminology


Refers to the height of a column of water that can be supported by the pressure or vacuum exerted at the pump.

Static Suction Head

The vertical distance between the pump impeller and the surface of the liquid on the suction side of the pump.

Dynamic Suction Head

The static suction head plus the additional suction head created by friction from the liquid flowing through the hoses, fittings, etc. Atmospheric pressure enables pumps to lift water. As a result, an atmospheric pressure of 14.7 psi at sea level limits practical dynamic suction head lift to less than approximately 26 feet for any pump.

Static Discharge Head

The vertical distance between the pump's discharge port and the point of discharge, which is the liquid surface if the hose is submerged or pumping into the bottom of a tank.

Dynamic Discharge Head

The static discharge head plus the additional discharge head created by friction or resistance (usually referred to as losses) from the liquid flowing through the hoses, fittings, sprinklers, nozzle, etc.

Total Head

The dynamic suction head plus the dynamic discharge head.


Pressure is force per unit area and is usually listed in psi (pounds per square inch). Pressure is often included in pump performance curves. Pressure and head are directly related when referring to pump performance. The pressure exerted (in psi) at the base of a column of water is 0.433 x Head (in feet). If you attach pressure gauge at the base of a pipe 100 feet tall pipe filled with clear water, you would measure 43.3 psi. Notice how the diameter of the pipe doesn't affect the pressure value. The maximum pressure (at zero discharge) of any pump can be determined by multiplying the maximum head by 0.433.

Friction Losses

The additional pressure or head created at the pump due to the friction of the liquid flowing through the hoses, pipes, fittings, etc. Friction losses always occur when a liquid is flowing through pipes and becomes greater as the length of pipe increases and/or the diameter decreases. Friction losses result in reduced pump output and can be minimized by used the largest and shortest hoses possible. Friction losses are included in dynamic suction and dynamic discharge head.


An impeller is a rotating disk containing vanes coupled to the engine's crankshaft. All centrifugal pumps contain an impeller. The impeller vanes sling liquid outward through centrifugal force, causing a pressure change. This pressure change results in liquid flowing through the pump.


The volute is the stationary housing enclosing the impeller. The volute collects and directs the flow of liquid from the impeller and increases the pressure of the high velocity water flowing from the vanes of the impeller.


Most centrifugal pumps require the pump casing to be filled with water before starting. Self-priming is a term often used to describe pumps that have the ability to purge air from the case and create a partial vacuum, allowing water begin flowing through the suction hose. All Honda pumps are defined as self-priming.

Mechanical seal

This is a spring-loaded seal consisting of several parts that seals the rotating impeller in the pump case and prevents water from leaking into and damaging the engine. Mechanical seals are subject to wear when pumping water containing abrasives and will quickly overheat if the pump is run without filling the pump chamber with water before starting the engine. Honda trash pumps contain silicone carbide mechanical seals, designed to withstand abrasive conditions.


The sudden formation and collapse of low-pressure vapor (bubbles) across the vanes of the impeller. When the surface pressure on a liquid becomes low enough, the liquid will begin to boil (even at room temperature). With centrifugal pumps, cavitation can occur when the suction vacuum becomes to great enough to allow water vapor or bubbles to begin forming at the impeller. When this water vapor travels through the rapid pressure increase across the impeller, a large amount of energy is released which can cause impeller damage. Minimizing suction head and using the largest practical suction hose diameter will reduce the likelihood of cavitation. You should never use a suction hose with a diameter smaller than the pump's suction port.

Water Hammer

Water Hammer is energy transmitted back to the pump due to the sudden stoppage of water flowing from the pump. Water hammer is more likely to occur when using a very long discharge hose. If the flow of water at the end of the discharge hose is shut off in less than the "critical time", energy is transmitted back to the pump causing a large pressure spike in the pump housing. Water hammer often results in damage to the pump casing.