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7 Best Pressure Washer Pumps – (Reviews & Guide 2021)

Pressure washer pumps are components that take water from the water faucet and pressurize it, generating high power when it comes out of the pressure washer. Pressure washer pumps are constructed to use a moderate water flow, which makes them different from other types of pumps. Pressure washer pumps have a life expectancy limited by the hours of use and need to be changed accordingly.

Best pressure washer pump brands are AR Annovi Reverberi, OEM Technologies, Homelite, Ezzy Pump, and CANPUMP. These brands’ products have advantages and disadvantages that are presented in the pressure washer pump reviews.

The factors that need to be analyzed before purchasing a pressure washer pump are pump type, flange connection, shaft connection, PSI, and GMP matching. These factors are detailed in this pressure washer pump buying guide.

The best pressure washer pumps are listed below:

  1. AR Annovi Reverberi 2400 PSI Triplex Pump
  2. OEM Technologies Horizontal Axial Cam Pump Kit 3100 PSI
  3. Universal 3000 PSI Power Pressure Washer Water Pump
  4. Homelite Vertical Pressure Washer Pump Replacement
  5. Ezzy Pump OEM HIMORE Pressure Washer Pump 3000 PSI New
  6. CANPUMP Triplex High Pressure Power Washer Pump 3000 PSI
  7. Troy Bilt Power Pressure Washer Water Pump

Best Pressure Washer Pumps Comparison Chart

PRODUCTDETAILS
AR Annovi Reverberi 2400 PSI Triplex Pump

AR Annovi Reverberi 2400 PSI Triplex Pump

  • Price: $$
  • Customer Rating: 4.6
  • PSI: 2400
  • GPM: 2.2
  • Type: Triplex
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OEM Technologies Horizontal Axial Cam Pump Kit 3100 PSI

OEM Technologies Horizontal Axial Cam Pump Kit 3100 PSI

  • Price: $$
  • Customer Rating: 4.6
  • PSI: 2100
  • GPM: 2.5
  • Type: Axial

 

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Universal 3000 PSI Power Pressure Washer Water Pump

Universal 3000 PSI Power Pressure Washer Water Pump

  • Price: $$
  • Customer Rating: 4.5
  • PSI: 3000
  • GPM: 2.5
  • Type: Axial
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Homelite Vertical Pressure Washer Pump Replacement

Homelite Vertical Pressure Washer Pump Replacement

  • Price: $
  • Customer Rating: 4.3
  • PSI: 2700
  • GPM: 2.4
  • Type: Axial
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Ezzy Pump OEM HIMORE Pressure Washer Pump 3000 PSI New

Ezzy Pump OEM HIMORE Pressure Washer Pump 3000 PSI New

  • Price: $$
  • Customer Rating: 4.1
  • PSI: 3000
  • GPM: 2.4
  • Type: Axial
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CANPUMP Triplex High Pressure Power Washer Pump 3000 PSI

CANPUMP Triplex High Pressure Power Washer Pump 3000 PSI

  • Price: $$$
  • Customer Rating: 4.4
  • PSI: 3000
  • GPM: 3.1
  • Type: Triplex
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Troy Bilt Power Pressure Washer Water Pump

Troy Bilt Power Pressure Washer Water Pump

  • Price: $
  • Customer Rating: 4.5
  • PSI: 2700
  • GPM: 2.3
  • Type: Axial
View On Amazon

Best Pressure Washer Pump Reviews (Updated List)

1. AR Annovi Reverberi 2400 PSI Triplex Pump

AR Annovi Reverberi 2400 PSI Triplex Pump

Annovi Reverberi is an Italian brand that has been present on the pressure washer market for more than 60 years. This brand has since then specialized in the manufacturing of high-quality durable piston and diaphragm pumps, becoming a world leader.

The Annovi Reverberi RMW22G24-EZ Triplex Pump is a durable pressure washer pump replacement designed as a universal item that is compatible with power washers from different brands. This pump is suited for cleaning units that have a vertical engine, but there is an option for horizontal motors, as well – the RMW22G24-EZ-SX 2 model.

The Annovi Reverberi RMW22G24-EZ Triplex Pump stands out due to its good price-quality ratio. This pump is not the most affordable on the market, but it delivers better performance than most of the competitors in this price range.

The Annovi Reverberi 2400 PSI Triplex Pump RMW22G24-EZ costs around $100.

The Annovi Reverberi RMW22G24-EZ Triplex Pump can produce 2400 PSI and a maximum water flow rate of 2.2 GPM. The spinning speed of this pump is 3400 RPM.

The Annovi Reverberi RMW22G24-EZ Triplex Pump measures 7 X 7 X 7 inches and its body is made of die-cast aluminum alloy. This durable and lightweight material makes the pump weigh only 5 pounds. The head of this pump is pressed in brass and made of steel.

The Annovi Reverberi RMW22G24-EZ Triplex Pump is compatible with pressure washers equipped with ⅞ inch shafts. The efficiency of this pressure washer pump is increased by the fact that the intake valves are placed above the pistons.

The maintenance of the Annovi Reverberi RMW22G24-EZ Triplex Pump is affordable, and its parts are replaceable in case of deterioration.

The AR Annovi Reverberi RMW22G24-EZ Triplex Pump is backed by a 1-year warranty.

The advantages of the Annovi Reverberi RMW22G24-EZ Triplex Pump are as follows:

  • The Annovi Reverberi RMW22G24-EZ Triplex Pump is compatible with most OEM carts.
  • The Annovi Reverberi RMW22G24-EZ Triplex Pump is equipped with a thermal relief valve that prevents the pump from overheating, expanding its lifespan.
  • The Annovi Reverberi RMW22G24-EZ Triplex Pump produces lower noise levels than its direct competitors.
  • The Annovi Reverberi RMW22G24-EZ Triplex Pump features a downstream chemical injection system that considerably reduces the time needed for a cleaning task.
  • The Annovi Reverberi RMW22G24-EZ Triplex Pump has an easy-start valve that makes operation easier.

The disadvantages of the Annovi Reverberi 2400 PSI Triplex Pump RMW22G24-EZ are as follows:

  • The Annovi Reverberi RMW22G24-EZ Triplex Pump is not suited for heavy-duty cleaning tasks.
  • The Annovi Reverberi RMW22G24-EZ Triplex Pump’s operator manual doesn’t offer clear information for all sections.

2. OEM Technologies Horizontal Axial Cam Pump Kit 3100 PSI

OEM Technologies Horizontal Axial Cam Pump Kit 3100 PSI

Simpson is a commercial and residential pressure washer manufacturer that provides OEM Technologies™ pumps in order to provide high-quality products that suit their customers’ needs.

The Simpson 90029 Horizontal Axial Cam Pump Kit is a highly efficient product designed to decrease engine load. This kit is suited for gas-powered pressure washers that have a horizontal motor with a shaft diameter of ¾ inches.

The Simpson 90029 Horizontal Axial Cam Pump Kit is different from its competitors because it is user-friendly. This pressure washer pump replacement is very easy to install and comes with an M22 outlet which eases connection.

The Simpson 90029 Horizontal Axial Cam Pump Kit is compatible with pressure washers from various brands due to its SAE bolt pattern of 15W40, standard connections, and hardware.

The Simpson 90029 Horizontal Axial Cam Pump Kit costs around $130.

The Simpson 90029 Pump Kit is compatible with power washers that can handle a maximum pressure rate of 3400 PSI and a 2.5 GPM maximum water flow rate.

The Simpson 90029 Pump Kit comes with a comprehensive and detailed operator’s manual. This pressure washer pump kit weighs 6 pounds and is relatively lightweight.

The Simpson 90029 Pump Kit comes with a replacement pump crankcase made of black aluminum. The pistons of the pump and the integrated unloader are made of stainless steel, and the pump head is made of brass.

The Simpson 90029 Horizontal Axial Cam Pump Kit comes with a 2-year limited pump warranty.

The advantages of the Simpson 90029 Horizontal Axial Cam Pump Kit are as follows:

  • The Simpson 90029 Pump Kit does not need maintenance, so it doesn’t require periodical oil changes.
  • The Simpson 90029 Pump Kit is long-lasting due to the thermal relief valve that prevents the overheating of the pump.
  • The Simpson 90029 Pump Kit is sealed to eliminate the risk of contamination and lubricant failure.
  • The Simpson 90029 Pump Kit is budget-friendly.
  • The Simpson 90029 Pump Kit is made of high-quality materials that expand its lifespan.

The disadvantages of the Simpson 90029 Horizontal Axial Cam Pump Kit are as follows:

  • The Simpson 90029 Pump Kit is not suited for professional pressure washers.
  • The Simpson 90029 Pump Kit comes with delayed customer service help.

3. Universal 3000 PSI Power Pressure Washer Water Pump

Universal 3000 PSI Power Pressure Washer Water Pump

Homelite is a brand that has become popular after WW2 for manufacturing electrical generators. Since then, this brand has specialized in the manufacturing and distribution of power equipment and replacement products, such as pressure washer pumps.

The Universal 3000 PSI Pressure Washer Pump is a reliable high-quality replacement that is designed for Generac and Honda engines and can work just as well with equipment made by other brands. Engines that have a ¾-inch shaft horizontal design are compatible with this pump but it’s recommended to check the OEM number in the operator’s manual of the pressure washer ahead of purchase.

The Universal 3000 PSI Pressure Washer Pump’s core strength is its power. This pump can produce 3000 PSI and a maximum water flow rate of 2.5 GPM, resulting in 7500 CU.

The Universal 3000 PSI Pressure Washer Pump costs around $100.

The Universal 3000 PSI Pressure Washer Pump is made of brass and is compatible with ac/dc power sources. This replacement model weighs 7.11 pounds and measures 20 x 14.5 x 12.3 inches.

In terms of maintenance, the Universal 3000 PSI Pressure Washer Pump requires a regular oil change in order to be protected from corrosion and other types of deterioration.

The Universal 3000 PSI Pressure Washer Pump is backed by a 1-year warranty.

The advantages of the Universal 3000 PSI Pressure Washer Pump are as follows:

  • The Universal 3000 PSI Pressure Washer Pump is really easy to use and can be connected by the user, it doesn’t need professional handling.
  • The Universal 3000 PSI Pressure Washer Pump is affordable considering the high power it can deliver.
  • The Universal 3000 PSI Pressure Washer Pump will not add a lot of weight to the pressure washer.
  • The Universal 3000 PSI Pressure Washer Pump provides a constant water flow.
  • The Universal 3000 PSI Pressure Washer Pump comes with a brass head that makes it durable.

The disadvantages of the Universal 3000 PSI Pressure Washer Pump are as follows:

  • The Universal 3000 PSI Pressure Washer Pump is not protected from overheating because it is not supplied with a thermal release pump.
  • The Universal 3000 PSI Pressure Washer Pump is a bit expensive compared to similar products.

4. Homelite Vertical Pressure Washer Pump Replacement

Homelite Vertical Pressure Washer Pump Replacement

Homelite is a well-renowned brand in the pressure washer industry that has a history of over 50 years. This brand manufactures reliable replacement parts that are very popular among power washer users, such as pumps.

The Homelite Vertical 308653045 308653052 Pump is a reliable universal replacement model that has an axial construction. This pump is suited for various power washer brands, such as Troy Bilt, Honda, Briggs & Stratton, Karcher, Annovi Reverberi, Generac, Craftsman, and more.

The Homelite Vertical 308653045 308653052 Pump stands out for its exceptional performance for its price. This pump replacement delivers 2500 PSI at 2.3 GPM and produces a constant water flow. The materials that this pump is made of are very durable and reduce the risk of leakage. This model comes pre-filled with oil.

The Homelite Vertical 308653045 308653052 Pump costs around $80.

The Homelite Vertical 308653045 308653052 Pump weighs only 4 pounds and measures 7 x 7 x 8.5 inches. This replacement pump is designed for ⅞-inch engine shafts and has a vertical design. The axial construction is what makes this item so small.

The warranty of the Homelite Vertical 308653045 308653052 Pump covers 1 year for manufacturer defects.

The advantages of the Homelite Vertical 308653045 308653052 Pump are as follows:

  • The Homelite Vertical 308653045 308653052 Pump is one of the most lightweight models on the market and does not overload the pressure washer.
  • The Homelite Vertical 308653045 308653052 Pump comes with easy installation that can be done at home, eliminating the need to visit a professional.
  • The Homelite Vertical 308653045 308653052 Pump is quieter than many similar products.
  • The Homelite Vertical 308653045 308653052 Pump is suited for many deep cleaning tasks.

The disadvantages of the Homelite Vertical 308653045 308653052 Pump are as follows:

  • The Homelite Vertical 308653045 308653052 Pump does not have a thermal relief valve to prevent overheating.
  • Homelite provides delayed customer service advice.

5. Ezzy Pump OEM HIMORE Pressure Washer Pump 3000 PSI New

Ezzy Pump OEM HIMORE Pressure Washer Pump 3000 PSI New

Himore is a world-known brand that has a place among the leaders of the pressure washer pump industry. This brand specializes in the production of high-quality pumps that provide great performance levels in order to fulfill various customers’ needs.

The HIMORE Pressure Washer Pump 3000 PSI is a reliable replacement model suited for most power washer brands. This model is distributed by Ezzy Pump and has become very popular among users due to its high-quality performance.

The HIMORE Pressure Washer Pump 3000 PSI is powerful and durable and this is what makes it stand out among competitors. This pump can deliver up to 3000 PSI and a maximum water flow rate of 2.5 GPM, resulting in 7500 CU. The body of the pump is made of high-quality strong metal and some parts are made of brass, increasing its lifespan.

The HIMORE Pressure Washer Pump 3000 PSI costs around $100.

The HIMORE Pressure Washer Pump 3000 PSI weighs 7.69 pounds, which is less than what products with similar power capacities have. This model is designed to suit ¾-inch horizontal shaft engines and is ideal for ac/dc power supplies.

The advantages of the HIMORE Pressure Washer Pump 3000 PSI are as follows:

  • The HIMORE Pressure Washer Pump 3000 PSI is equipped with a chemical injector that facilitates the mixture of water and detergents in order to provide deep cleaning.
  • The HIMORE Pressure Washer Pump 3000 PSI has a thermal relief valve that prevents overheating, which enhances the lifespan of the pump.
  • The HIMORE Pressure Washer Pump 3000 PSI is affordable considering its power.
  • The HIMORE Pressure Washer Pump 3000 PSI delivers a consistent water flow.
  • The HIMORE Pressure Washer Pump 3000 PSI provides quick installation.

The disadvantages of the HIMORE Pressure Washer Pump 3000 PSI are as follows:

  • The HIMORE Pressure Washer Pump 3000 PSI is a bit noisy.
  • The HIMORE Pressure Washer Pump 3000 PSI needs more attention due to its high power levels.

6. CANPUMP Triplex High Pressure Power Washer Pump 3000 PSI

CANPUMP Triplex High Pressure Power Washer Pump 3000 PSI

Canpump Inc is a company based in Toronto that distributes high-quality reliable Italian pumps and accessories in North America.

The CANPUMP Triplex Pressure Washer Pump 3000 is a replacement model designed to be used on gas-powered pressure washers. This pump is ideal for commercial pressure washers, as it can deliver up to 3000 PSI and 3.1 GPM, resulting in 9300 CU. This total cleaning power makes this pump suited for pressure washers that perform medium to heavy-duty cleaning.

The CANPUMP Triplex Pressure Washer Pump 3000 stands out among competitors due to its durable construction. This model is supplied with an anodized die-cast housing accompanied by a forged brass manifold. The plunger is made of stainless steel and the wobble plate is made of strengthened aluminum.

The CANPUMP Triplex Pressure Washer Pump 3000 costs around $200.

The CANPUMP Triplex Pressure Washer Pump 3000 weighs 18 pounds and is compatible with pressure washers that have a ¾-inch shaft. The engines compatible with this replacement pump need to come with 6.5 HP.

The maintenance of the CANPUMP Triplex Pressure Washer Pump 3000 is affordable as the valves are really easy to replace. The ease of access to the head of the pump facilitates maintenance.

The CANPUMP Triplex Pressure Washer Pump 3000 is backed by a 1-year manufacturer warranty.

The advantages of the CANPUMP Triplex Pressure Washer Pump 3000 are as follows:

  • The CANPUMP Triplex Pressure Washer Pump 3000’s crankcase features a cooling fin that maximizes heat dissipation.
  • The CANPUMP Triplex Pressure Washer Pump 3000 comes with a ceramic plunger that increases resistance to wear, making the pump long-lasting.
  • The CANPUMP Triplex Pressure Washer Pump 3000 is equipped with a ball and roller bearing that maximizes load distribution.
  • The CANPUMP Triplex Pressure Washer Pump 3000 has a thermal relief valve that prevents overheating.

The disadvantages of the CANPUMP Triplex Pressure Washer Pump 3000 are as follows:

  • The CANPUMP Triplex Pressure Washer Pump 3000 is a bit heavy compared to similar products.

7. Troy Bilt Power Pressure Washer Water Pump

Troy Bilt Power Pressure Washer Water Pump

Troy Bilt is a company that specializes in the production of power tools needed around the yard. This company manufactures reliable and long-lasting replacement parts, and its pumps make no exception when it comes to high quality.

The Troy Bilt Pressure Washer Pump is a reliable axial pump designed for two power washer models manufactured by Troy Bilt: 020344 and 020344-0. This pump is compatible with other brands also but reading the pressure washer instruction manual is recommended before purchase to make sure that the specifications are comparable.

The Troy Bilt Pressure Washer Pump’s core strength is its affordability. This power washer pump replacement costs around $70 and is highly reliable and durable. The head and the body of this pump are made of heavy-duty metal that expands the pump’s lifespan.

The Troy Bilt Pressure Washer Pump delivers 2500-2800 PSI and a maximum water flow rate of 2300 GPM. Designed for vertical shaft engines, this pump replacement fits ⅞-inch craft-shafts. The hose connection of the pump measures 0.86 X 0.55 inches.

The Troy Bilt Pressure Washer Pump comes with a 1-year warranty that covers manufacturer defects.

The advantages of the Troy Bilt Pressure Washer Pump are as follows:

  • The Troy Bilt Pressure Washer Pump doesn’t add a heavy load to the pressure washer as it weighs only 6.24 pounds.
  • The Troy Bilt Pressure Washer Pump is equipped with a thermal relief bypass valve that prevents overheating, expanding its lifespan.
  • The Troy Bilt Pressure Washer Pump is really easy to install.
  • The Troy Bilt Pressure Washer Pump is suited for higher discharges.
  • The Troy Bilt Pressure Washer Pump comes with low hydrodynamic losses.

The disadvantages of the Troy Bilt Pressure Washer Pump are as follows:

  • The Troy Bilt Pressure Washer Pump is not suitable for all types of engines and, if not matched correctly, will break quickly.

When Do I Need to Replace My Pressure Washer Pump?

It’s not every day that you need to replace such an integral part of your pressure washer like a pump. If the pump has failed, you’ll know what’s up instantly – if water runs out of your pressure washer at all, it won’t be pressurized, or it won’t be able to reach higher pressures.

Why Do Pressure Washer Pumps Fail?

Generally, all pressure washer pumps have a pre-defined life expectancy. Cheaper models come with a pump rated at about 200 hours, while some commercial grade pressure washers can put out as much as 5000 hours of work. You might find this number in your model’s user manual, though the manufacturer may not specify it.

However, the reason why your pressure washer pump failed doesn’t have to be natural wear and tear. There are some other common reasons for pump failure: cavitation, and overheating due to running with no pressure relief.

1. Cavitation

Whether it’s rapid changes in pressure or insufficient flow of supplied water, cavitation is a common problem for pressure washer pumps. Cavitation is a descriptive name for a formation of bubbles, or air or vapor-filled cavities inside the pump. If your pressure washer wand feels unstable and vibrates when you’re spraying, and you feel surges of pressure, cavitation is a likely culprit.

The most common reason why cavitation happens to pumps is insufficient water supply. When you attach your pressure washer to water supply, the incoming water must be sufficient for the washer’s GPM (gallons per minute) rating at all times. Fluctuations in water intake or overall insufficient incoming water can cause your pressure washer pump to fail. Even if the difference in the water volume is only slightly lower, for example, 2.8 for a 3 GPM pressure washer, the discrepancy is big enough for trouble to appear. If you’d like to check whether your faucet produces enough water for your pressure washer, check the time it takes to fill a 5-gallon bucket from the faucet directly. The water supply per minute must be higher than the rating on your pressure washer.

2. Bypass water overheating

Your pressure washer pump builds pressure whether you’re currently spraying or not. But you may receive a phone call, or you might need to rearrange some of your tools every once in a while. So what happens once you stop squeezing the nozzle trigger? The pressure is no longer being relieved. And there’s only so much pressure build-up your pressure washer can handle.

However, the non-relieved pressure is not what damages your machine once you stop squeezing the trigger. After enough pressure is built-up, the unloader valve (also called thermal release valve) activates and opens a bypass for the water to flow through. This water is then depressurized in the bypass inlet and sent through the pump again, and it circulates until it’s eventually released.

This bypass mechanism is designed to protect your pump. However, you shouldn’t let it go on for too long. Along the way, the crankcase generates heat, which is usually mitigated by the constant flow of fresh, cold water. However, as the same water is cycled through the pump, this same water gets warmer.

If the water going through the bypass cycle overheats, it can damage your pump. Remember that the maximum safe temperature of water in a pressure washer is only a bit above 60 degrees Fahrenheit, which really isn’t that much. Most manufacturers allow up to 2 minutes for the water in bypass. However, we’d recommend never letting your pressure washer work without squeezing the nozzle for longer than 45 seconds. Instead, you should turn off your unit – simply restarting it after you’re done with your phone call will help prolong the lifespan of your pump.

What Is a Pressure Washer Pump?

Best Pressure Washer PumpA pressure washer has one, very simple job: Taking water from your regular water faucet, and pressurizing it so that it blasts out with a lot of power. The main component in this process of pressurization is your pressure washer pump. It’s an essential part that makes your pressure washer what it is. Whether it’s washing your car, removing gum off your patio, or sandblasting rust off of your old wheelbarrow – the pump of the pressure washer is what makes it all possible.

Unlike many other types of pumps, for example, the sump pump, the pumps in pressure washers are designed to take a low flow of water and produce high pressure. However, not all pressure washer pumps are made equal, so there are many types and different models out there. Some of them are driven by pistons run by an angled (wobble) plate, while others are moved by a crankshaft. Choosing the right replacement pump for your particular model of pressure washer will make the difference between returning your pressure washer to life and having to return the pump to the seller.

Types of Pumps for Pressure Washers

Pressure Washer Pump ReviewsPressure washers come in many shapes and sizes – from hefty, powerful commercial units, to the weaker but compact portable models. Because of the massive differences between their pressurizing power and water flow, they are different from the inside, starting with the pump. There are three types of commonly used pressure washer pumps: wobble plate, axial, and triplex pumps. Let’s go through its main properties.

1. Wobble Plate

These entry level pumps utilize a wobbling plate that pushes fixed pistons to create suction and pressurize water.

Wobble plate pumps are basic pumps that are often used in pressure washers with PSI under 2500 PSI, and flow rates lower than 2 GPM. They have a lifespan between 200 and 400 hours of work time, which meets the needs of most households. This work time translates to approximately 3 hours per week for more than 2 years.

They are sealed shut and don’t require maintenance. Given that these pumps come at a lower cost, most people prefer to replace them without attempting to repair them.

2. Axial Cam Pump

An axial cam pump works on a similar principle as a wobble plate pump, but the pistons rotate around the plate as the pump works. That small modification allows a bigger oil reservoir, which dramatically increases the life expectancy and power output of this type of pump.

Axial pumps have an improved life span which falls between 500 and 800 hours of work. They’re also more powerful, and they’re commonly used in pressure washers of up to 3500 PSI.

Some variable models allow you to adjust the angle of the plate, adjusting the water flow. However, it’s usually not worth the price to try and repair them, so most people prefer to replace them as soon as they fail.

3. Triplex Pump

The most powerful among pressure washers use a triplex pump. These apply three pistons to pump out water at a much higher pressure and consistent flow than the less powerful types of pumps.

Triplex pumps come at the highest price initially, but they have a virtually unlimited life span. However, they do require some maintenance, manly an oil change every now and then to keep them in great shape. A triplex pump is used in most pressure washers which can output 3000 PSI or more.

Apart from occasional maintenance, you can also replace specific parts of a triplex pump if it fails before other parts and pieces. That makes a triplex pump a higher initial investment, but also one that really pays off the more you use your pressure washer.

Pressure Washer Pump Buying Guide

Pressure Washer Pump Buying GuideGetting the right pressure washer pump can be difficult. You want the pump to fit into your pressure washer right out of the box, without the need for any modifications. To do this, you should pay attention to a couple of important factors.

1. Suitable Pump Type

The most important thing you should check before making your pick is what kind of a pump is compatible with your pressure washer. Most domestic use models utilize either a wobble or an axial pump, while the more powerful ones require a triplex pump. Due to the massive differences between the construction and the size of these types, it’s important to know the exact type you need.

If you can’t find the user manual of your pressure washer, you’ll have to open the casing and take a look at how the pump is attached to the motor. In an axial pump, the driveshaft spins the cylinders directly, so it will be turned towards the brass valves. In a triplex pump, the driveshaft runs next to the brass valves and connects to a crankshaft. Make sure to also measure the shaft diameter.

2. Flange and Shaft Connection

Next up, you should figure out how the pump is mounted to the rest of the pressure washer components. To do this, you should take a look at the flange. First off, you should figure out how the pump is attached – vertically or horizontally, and how it’s attached to the motor.

Determine the number of bolts, and their dimensions and distances. It’d be best if you can find the model that can be attached to your pressure washer right out of the box, without the need for any modifications to make it fit.

Finally, some pressure washer engines are made with a 3/4″, while others utilize a 7/8” crankshaft. Make sure to measure your shaft so the new pump can fit properly.

3. Matching PSI and GPM

Finally, you should match the PSI (pounds per square inch) and GPM (gallons per minute) ratings of the replacement pressure washer pump to your pressure washer. Getting a new pump is NOT the time to try and upgrade the PSI/GPM rating of your pressure washer. Even though you could, technically, install a more powerful pump, chances are that the rest of the pressure washer construction wouldn’t be able to handle the additional power. If you install a higher-rated replacement pump, the most likely scenarios are your hose or nozzle bursting, or the engine not being able to keep up with the new requirements. So – match the PSI and GPM ratings with the current specifications of your machine.

How to Replace a Pressure Washer Pump?

How to Replace a Pressure Washer PumpReplacing the pump of your pressure washer is not as difficult as it may sound at first. Let’s go through the basic steps you should take once your replacement pressure washer pump arrives.

1. Consult Your User Manual

In this guide, we’ll give you a general overview of the steps you should take to install your new pump. However, make sure to thoroughly read the instruction manual that comes with your new pump, and consult your pressure washer’s instruction manual as well.

If you can’t find your pressure washer user manual, you should try your luck online. The search query is simple – try searching with this formula:

  • Pressure washer manufacturer and model + “user manual”

So, if you own a Sun Joe SPX3001, your search query should look like this: “Sun Joe SPX3001 user manual”. You will find the manual among the first couple of results.

2. Disconnect the Old Pump

You don’t need a lot of tools to replace your pressure washer pump. In most cases, you will only need:

  • Wrench and Allen key
  • Anti-seize

First off, you should remove any components connected to your pressure washer. This includes the water supply and the outlet hose, and the chemical injection tube. If you own a pressure washer in a plastic casing, you should gently disassemble the casing to expose the inner components of the machine.

Once you have access to the inner part of the unit, you should remove the old pump from your pressure washer.

Loosen the bolts that attach the pump to the engine with a suitably sized wrench or Allen key. When you remove the bolts, your pump will stay mounted on the crankshaft. You should be able to slide it off. If it doesn’t come off easily, make sure that there isn’t an additional bolt-on the shaft itself. If your shaft is rusty, you may need to pull a bit harder to get it off. A rectangular key will likely fall out of the shaft with your pump. Get it and place it back into the shaft.

Once your old pump is off, apply anti-seize on the exposed engine shaft so that mounting and dismounting are easy in the future and to avoid corrosion. This is important because the metal parts are in constant contact with water.

3. Mounting the New Pump

Before you start mounting your engine, make sure that it has a thermal relief valve (the bypass valve) installed. Some pumps don’t come with this valve installed, so you may have to reuse the one from your old pump, or get a new one.

Once you’re ready to install, simply slide the pump on the crankshaft, and tighten the bolts well.

Now, you can go on and mount the plastic casing and the removed parts.

FAQ About Pressure Washer Pumps

1. Who makes the best pressure washer pumps?

A pressure washer pump is not a very complex device, so chances are that if you pick a suitable type, any pump will do just fine. Of course, you should get one that’s made out of good materials.

When it comes to brands, we’d recommend always to go with the same brand that your manufacturer used. Original parts are always the safest choice because they’re 100% compatible with your machine. However, that’s not always possible. If the manufacturer of your pressure washer doesn’t offer replacement parts, you can go with a universal pump. The brands that offer such parts are, among others, Annovi Reverberi, OEM Technologies, and Himore.

2. How long should a pressure washer pump last?

The longevity of your pressure washer pump mainly depends on the type of pump. Along with the output pressure, the durability of pumps is reflected in their price. So, a triplex pump will last the longest, and an axial pump will last longer than a wobble plate one. When it comes to particular numbers of work hours, you should look for specifications provided by the manufacturer in the user manual for your particular model. However, to give you a general picture, a wobble plate pump should last at most 500, an axial model up to 900 hours, while a triplex pump has a virtually unlimited work time though it requires regular maintenance after each 1000-1500 work hours.

3. Can I repair my pressure washer pump instead of replacing it?

If your pressure washer uses a wobble pump or an axial pump, then sadly, there’s no alternative to replacing the pump – once it goes, it goes. That’s why you should make sure that the pump truly is the problem, and not the motor or some other smaller part of your pressure washer.

However, if you invested in a triplex pump, chances are that you can open it and get it repaired. In fact, you can purchase each part of a triplex pump and replace it separately, without the need to get an entirely new pump. That is why triplex pumps cost so much more upfront.

4. How can I prolong the lifespan of my new pressure washer pump?

Replacing your pressure washer pump can make your unit work as good as new. So, how can you make sure that it keeps working properly for a long time?

Apart from good overall maintenance, there are two things you should pay attention to:

  • Make sure that the water supply that you connect to has constant and sufficient water flow. If your pressure washer is rated for 3 gallons per minute (GPM), the water faucet you use must have a flow 3 or more gallons per minute at all times. Insufficient or unstable water supply can result in excess vapor or air in your water, causing bubbling. When bubbles burst, they create bits of shock which can easily damage your pump. This process is called cavitation.
  • If you need to take a break from spraying with your pressure washer, even if it’s just for a minute, it’s safer to turn off the machine than to simply stop squeezing the nozzle trigger. Even though every pressure washer has a built-in safety bypass, leaving your machine in the bypass mode can quickly lead to overheating and subsequent damage to the pump.
  • Make sure you read your pressure washer’s user manual to make sure you’re using your machine correctly and to find more ways to prolong the lifespan of your unit.

Wrap Up

The pump is the heart of your pressure washer. It is what makes the machine what it is – the piece that pressurizes water and makes it blast out, helping you keep your house, front yard, car, and many other parts of your household clean and shiny like new. However, a pump can fail, and once it does, you don’t need to buy a new pressure washer altogether. With the best pressure washer pump to replace the failed part, you can continue to use your faithful washer without the need to spend hundreds of dollars on a new machine.

Hopefully, you found that perfect model in our pressure washer pump reviews. We hope our buying guide helped you learn everything you need to know about picking and installing a new model in your pressure washer. If you have any questions left, don’t hesitate to send us a message!

See also: best pressure washer pump oils

About Adam Wallace

Adam Wallace is passionate about speed – he loves his motorcycle and adores his car. He knows that if you want your vehicle to love you, you gotta love it back – so he spends a considerable time pampering his rides. Nothing beats the sparkle of paint after a good pressure washing, so he decided to share his best tips and tricks here.

3 thoughts on “7 Best Pressure Washer Pumps – (Reviews & Guide 2021)”

    • Hi Dale,

      Sorry, we don’t have experience with that model.
      Maybe you can check the user comments for compatibility, sorry.

      Reply
    • You can do alot of research from starting at the fitment specs of your pump that mirrors from the factory.
      There are 100’s of options. Whatever you choose, always find a pump that is serviceable in the long run. May even last as long as the motor. In my experience the plunger/piston pump with belt drive is always the way to go in my equipment. Good luck!

      Reply

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