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:
- AR Annovi Reverberi 2400 PSI Triplex Pump
- OEM Technologies Horizontal Axial Cam Pump Kit 3100 PSI
- Universal 3000 PSI Power Pressure Washer Water Pump
- Homelite Vertical Pressure Washer Pump Replacement
- Ezzy Pump OEM HIMORE Pressure Washer Pump 3000 PSI New
- CANPUMP Triplex High Pressure Power Washer Pump 3000 PSI
- Troy Bilt Power Pressure Washer Water Pump
Best Pressure Washer Pumps Comparison Chart
| PRODUCT | DETAILS | ||
|---|---|---|---|
 | AR Annovi Reverberi 2400 PSI Triplex Pump |
| View On Amazon |
 | OEM Technologies Horizontal Axial Cam Pump Kit 3100 PSI |
| View On Amazon |
 | Universal 3000 PSI Power Pressure Washer Water Pump |
| View On Amazon |
 | Homelite Vertical Pressure Washer Pump Replacement |
| View On Amazon |
 | Ezzy Pump OEM HIMORE Pressure Washer Pump 3000 PSI New |
| View On Amazon |
 | CANPUMP Triplex High Pressure Power Washer Pump 3000 PSI |
| View On Amazon |
 | Troy Bilt Power Pressure Washer Water Pump |
| View On Amazon |
Best Pressure Washer Pump Reviews (Updated List)
1. 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
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
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 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
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 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 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.
How Does a Pressure Washer Pump Work?
A pressure washer pump is similar to a hand pump but all the work is done by an engine or a motor. The principle behind a power washer is that it is connected o a water source through a garden hose. The pressure washer pump, moved by the power of the engine, draws water from the source and propels it through the high-pressure hose and out of the unit through the nozzle tip.
Pressure washer pumps are of different types and their internal mechanisms differ but the principle is the same. The engine moves the pump rapidly. When pulled one way, the pump draws out water from the water source. The water circulates inside the pressure washer pump. When moved the other way, the pump releases water out at high pressure.
The most basic power washer pump creates pressure by using a wobble plate to move the pump pistons back and forth. This plate is attached to the drive shaft. The move of the pressure washer pump pistons generates suction which is followed by the evacuation of the water through the water outlet of the unit. All pistons have a spring attached that allows the wobble plate to create motion. This mechanism is not the most efficient, as the plate needs to create enough force to move the water, as well as the springs.
The working mechanism of an axial cam pump is similar to that of a wobble plate pump, with the exception that, in this case, the pistons perform a rotating motion around a swash plate. The angle of this plate allows the pistons to move from one side to another and perform the same process of sucking in water and delivering it on the other side. The rotation motion has the same centerline as the drive shaft.
The more efficient pressure washer pumps use a similar mechanism to vehicle pumps. This type of power washer pump has 3 pistons, this is why it is called a triplex pump. Triplex pumps are equipped with crankshafts and connecting rods. The movement of these pumps’ pistons is performed at 120 degrees apart, which improves the flow, offering smoothness.
Most pressure washer pumps require lubricants to work properly. The lubricant’s role is to remove friction and expand the life of a pressure washer pump. The motion of the pump parts causes friction that can lead to heating, rusting, and aeration. These parts move a lot smoother in the presence of a lubricant. Some pumps are sealed and do not require oil changes while others need fresh oil to work properly.
What Is a Pressure Washer Pump?
A pressure washer pump is the main component of a pressure washer that takes water from the faucet and pressurizes it, making it possible for the pressure washer to wash floors, cars, or sandblast rust off. Unlike sump pumps, pressure washer pumps are designed to take a low flow of water and turn it into high pressured water. Some pressure washer pumps are driven by pistons run by an angled (wobble) plate, while others are moved by a crankshaft.
When Do I Need to Replace My Pressure Washer Pump?
A pressure washer pump needs to be replaced when a pressure washer is not delivering any water or if the water coming out of it is not pressurized. Pressure washer pumps don’t break often, yet, need to be replaced as soon as the pressure of water delivered by the pressure washer is low or insufficient.
Why Do Pressure Washer Pumps Fail?
Pressure washer pumps fail because each unit has a predefined life expectancy. Cheaper pressure washer pumps have a life expectancy of around 200 hours while pressure washer pumps built into commercial grade pressure washers can put out as much as 5,000 hours of work.
Other reasons why pressure washer pumps fail are cavitation and overheating after the pump has been working for an extended period without pressure relief.
1. Cavitation
Whether it is caused by rapid changes in pressure or insufficient flow of supplied water, cavitation can damage a pressure washer pump. Cavitation is a formation of bubbles or air or vapor-filled cavities within the pressure washer pump. Cavitation can make the pressure washer vibrate while spraying water, cause sudden surges of pressure, or make the pressure washer unstable.
Cavitation develops in pressure washer pumps with insufficient water supply. When the pressure washer is connected to the water supply and the incoming water pressure is below the recommended pressure and if the GPM rating can’t be met, cavities will start forming. Fluctuations in water intake or overall insufficient incoming water can cause a pressure washer pump failure. To check whether the water pressure is high enough, a 5-gallon bucket should be filled with the water from the faucet directly. If the water supply per minute meets the GPM rating of a pressure washer, cavities won’t start forming.
2. Bypass water overheating
When a pressure washer is turned on but not spraying water and the pressure is not relieved, the pressure will start building up within the pump. After enough pressure is built-up in a pressure washer pump, the unloader valve also called the 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 pressure washer pump again. The bypass mechanism protects the pressure washer pump but it can’t stand the pressure for too long. While the pressure is generated in the pressure washer pump, the crankcase generates heat.
If the water going through the bypass cycle overheats, it can damage the pressure washer pump. The maximum safe temperature of water in a pressure washer is slightly above 60 degrees Fahrenheit, while the bypass takes 2 minutes to overheat, after which it can’t continue protecting the pressure washer pump. The pressure washer shouldn’t be left to work without releasing the pressure for longer than 45 seconds, after which it should be turned on, which protects the life of the pressure washer pump.
How to Know If a Pressure Washer Pump Is Bad?
If a pressure washer pump is unable to maintain the pressure, reach the advertised GPM or PSI, sucks too much air, leaks, or provides inconsistent results, there is a chance it went bad.
How to Maintain a Pressure Washer Pump?
A pressure washer pump should be kept clean and dirt and buildup around the connections should be occasionally removed. A pressure washer pump oil should be changed regularly to keep the pump in a good condition. Leftover water should be removed from the pressure washer pump, it should be winterized, and stored to protect freezing and mineral deposits from forming.
Types of Pumps for Pressure Washers
The most common types of pressure washer pumps are wobble plate, axial, and triplex pumps, all of which are listed below.
1. Wobble Plate
The simplest pressure washer pumps use wobble plates that push fixed pistons to create suction and pressurize water. Wobble plate pressure washer pumps are often used in pressure washers with PSI under 2,500 PSI, and flow rates lower than 2 GPM. Wobble plate pressure washer pumps have a lifespan between 200 and 400 hours of work time. Wobble plate pressure washer pumps are sealed shut, self-priming, can run dry and don’t require maintenance. Wobble plate pressure washer pumps have an average lifespan of 2 to 3 years.
2. Axial Cam Pump
An axial cam pump comes with the pistons that are rotating around the plate as the pressure washer pump works. Axial cam pumps are compact and light and have big reservoirs that increase their life expectancy and power output.
Axial cam pumps have an improved life span between 500 and 800 hours of work, they are more powerful, and more commonly used in pressure washers rated at 3,500 PSI. Some axial cam pumps allow adjusting the angle of the plate and the water flow. Axial cam pumps can run at high speeds, yet take longer to cool down than triplex pumps.
3. Triplex Pump
Most powerful pressure washers come with triplex pressure washer pumps with an output of 3,000 PSI and higher. Triplex pressure washer pumps apply three pistons to pump out water at very high pressure and consistent flow. Triplex pumps are expensive because they have an unlimited life span and are less prone to leakages. Triplex pumps require some maintenance and regular oil changes.
Pressure Washer Pump Buying Guide
When purchasing pressure washer pumps, factors such as pump type, flange and shaft connections, and PSI and GPM ratings should be considered, all of which are listed below.
1. Suitable Pump Type
A pressure washer pump should be compatible with a pressure washer. Most regular pressure washers and portable pressure washers use wobble plate or axial cam pressure washer pumps while commercial pressure washers use triplex pumps. Due to major differences between the pressure washer and pressure washer pumps in terms of size, shaft diameter, and construction, pressure washer pumps should be used with matching pressure washers.
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.
2. Flange and Shaft Connection
Pressure washer pumps can be attached to pressure washers vertically or horizontally. The flange determines the way how the pressure washer pump is mounted on the pressure washer. The number of bolts, their dimensions, and distances should be determined before buying a pressure washer pump. The pressure washer’s shaft should be measured before buying a pressure washer pump since some pressure washer engines are made with a 3/4″, while others utilize a 7/8” crankshaft.
3. Matching PSI and GPM
The PSI and GPM ratings of the pressure washer pump should meet the PSI and GPM ratings of the pressure washer. The pressure washer pump shouldn’t be more powerful than the pressure washer neither the pressure washer should put too much pressure on the pressure washer pump. Installing a higher-rated pressure washer pump may make the pressure washer hose or nozzle burst or the pressure washer engine will break down.
How to Replace a Pressure Washer Pump?
To replace a pressure washer pump, a user manual should be consulted, the old pump should be disconnected, and a new pressure washer pump should be installed.
1. Consult Your User Manual
Pressure washer user manuals contain information about the right type and size of the pressure washer pumps to install.
2. Disconnect the Old Pump
The tools needed for pressure washer pump replacement are a wrench, Allen key, and anti-seize. The water supply, outlet hose, and chemical injection tube should be detached from the pressure washer. Once the plastic casing of the pressure washer is disassembled, the bolts that attach the pressure washer pump to the pressure washer engine should be loosened using a wrench or Allen key. When the bolts are removed, the pressure washer pump should be slid off the crankshaft. Anti-seize should be applied to the pressure washer engine so the metal parts do not corrode even when they come into contact with water.
3. Mounting the New Pump
A thermal relief valve should be installed before the pressure washer is installed to the pressure washer. The pressure washer pump should be slid on the crankshaft, the bolts should be tightened, and the plastic casing and detached parts should be re-installed.
FAQ About Pressure Washer Pumps
1. Who makes the best pressure washer pumps?
The best pressure washer pumps are made by brands such as Himore, Annovi Reverberi, and OEM Technologies.
2. How long should a pressure washer pump last?
A pressure washer pump can last between 200 and 1,500 working hours. Wobble plate pumps can work for up to 500 hours and axial cam pumps can work around 900 hours. Triplex pumps should last for a lifetime since they have an unlimited work time but should be maintained every 1,000 to 1,500 working hours.
3. Can I repair my pressure washer pump instead of replacing it?
Wobble or axial cam pressure washer pumps can’t be repaired, only replaced. Triplex pressure washer pumps can be repaired since each part can be replaced if it stops working.
4. How can I prolong the lifespan of my new pressure washer pump?
To prolong the lifespan of a new pressure washer pump, the water supply to which the pressure washer is connected should provide constant and sufficient water flow. Insufficient or unstable water supply can result in excess vapor or air in the water and cause bubbles that can damage the pump, which is a process called cavitation.
To prolong the lifespan of a new pressure washer pump, the pressure washer should be turned off when not being used for longer than 30 and 45 seconds. Leaving a pressure washer pump in the bypass mode can lead to overheating and subsequent damage to the pump. The best pressure washer pump oils should be used to extend pressure washer pumps’ lifespan.
I have a generac model 1537-1 and it needs a new pump. what would you recommend from the very best on down.
Hi Dale,
Sorry, we don’t have experience with that model.
Maybe you can check the user comments for compatibility, sorry.
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!