Triplex Pump

If you’re searching for a triplex pump for your pressure washer, you’ve landed at the right page. Let’s review the best triplex pumps and also talk about how they’re different from axial cam pumps:

AR Triplex Pump RSV4G40-PKG Review

The AR North America triplex plunger pump RSV4G40-PKG is a popular heavy-duty replacement pump for your pressure washer. Let’s review its components, PSI/GPM, working life and features.

And you can check Amazon's price on the AR Triplex Pump.

This AR triplex pump is built of quality materials and the metals used lack porosity (small voids within metal castings) for longer life.

  • Construction Materials: this triplex plunger pump is built using proprietary alloy aluminum, a bronze base, and uses stainless steel plunger rods. The aluminum and bronze are both touted as being free from porosity for added durability. The crankcase features large fins and is anodized for better heat dissipation; both features that add to the life of the pump.
AR Triplex Pump Review

You can check Amazon's price on the AR North America Triplex Pump.

  • PSI: the AR North America triplex plunger pump RSV4G40-PKG is able to generate up to 4,000 PSI. That is more than enough to tackle the toughest jobs you could find yourself facing.
  • GPM: this triplex pump or plunger pump is able to pump up to 4 gallons per minute.
  • Other Features: this triplex plunger pump is designed to be used with gas engines and utilizes an F40 gas flange. It also offers a 3/8 quick connect for easy installation.

Most Asked Questions about the AR Triplex Pump:

Is this triplex pump mounted horizontally or vertically?

A. The AR North America triplex plunger pump RSV4G40-PKG is mounted horizontally.

What is the AR North America triplex plunger pump shaft size?

A. The AR North America triplex plunger pump RSV4G40-PKG features a 1 inch hollow shaft.

And you can check Amazon's price on the AR Triplex Pump.

Will this AR North America Triplex Pump work with Honda engines?

A. Yes, AR North America triplex plunger pump RSV4G40-PKG will work with Honda engines between 11 hp and 13 hp. Those engines are found in the GX 340 and GX 390 series pressure washers. It is recommended that you use a 13 hp engine with this triplex pump to achieve maximum pressure and GPM pumped.


AR Triplex Pump Video

I wanted to share this AR triplex pump video which gives you tips on routine maintenance and troubleshooting.

With just normal & routine maintenance, a triplex pump is designed to outlast axial cam pumps - to give you many more working hours.


Important Manuals and Parts for the AR Triplex Pump

If you want to learn even more about this AR triplex pump, I wanted to share a manual and parts information that you can view or download:

Manual - Triplex Pump

Parts - Triplex Pump

Warranty - AR Triplex Pump

Or you can visit the AR North America website.


What is a triplex pump?

what is a triplex pump?

What is a triplex pump? A triplex pump is a positive displacement pump that increases the pressure (PSI) in the water as it moves the water through the pressure washer system and out the spray nozzle. A triplex pump has three pistons (also called plungers) that are powered by the crank-shaft of the pressure washer engine.

Triplex pumps are designed to last longer, on average, than axial cam pumps installed pressure washers. A triplex pump is usually found on higher quality pressure washers for consumers and commercial contractors.


EOPE B00IIVJCKC Triplex Pump Review

The only way you can do an apples-to-apples comparison of the AR North America triplex plunger pump RSV4G40-PKG vs the EOPE triplex pump B00IIVJCKC is to lay out all of the same information back-to-back. To that end, here is a breakdown of the construction material, PSI generated, and the gallons per minute(GPM) of the EOPE triplex plunger pump B00IIVJCKC.

  • Construction Materials: this EOPE triplex pump is built with a forged brass manifold, ceramic plunger, a one-piece aluminum connecting rod, and a hardened crankshaft: all for the longest working life possible.
  • PSI: the EOPE triplex plunger pump B00IIVJCKC is able to generate up to 3,600 PSI. That is plenty of pressure to tackle tons of grease and grime under most circumstances.
  • GPM: this triplex pump is able to pump a tad more than the AR unit we are looking at. The EOPE B00IIVJCKC has a maximum flow rate of 4.76 gallons per minute.
  • Other Features: this triplex plunger pump uses an F40 gas flange and also features a 3/8 quick connect for easy installation.

The same questions that are frequently asked about the AR unit are asked about the EOPE triplex pump B00IIVJCKC. So, here is another Q&A section to help you understand what you are getting with this triplex pump.

Is this triplex pump mounted horizontally or vertically?

A. The EOPE triplex plunger pump B00IIVJCKC mounts horizontally.

Will this EOPE triplex plunger pump work with Honda engines?  

A. Yes, this triplex pump will work with Honda engines. It works with the 11 hp and 13 hp engines found in the GX 340 and GX 390 just as the AR unit reviewed above does. You will achieve the highest GPM and PSI with the 13 hp engine.

What is the EOPE triplex pump shaft size?

The EOPE triplex pump B00IIVJCKC features a one inch hollow shaft.

As you can see the AR North America triplex pump RSV4G40-PKG and the EOPE triplex pump B00IIVJCKC are very similar units. They can each be used with the same Honda engines and have nearly identical price points. The AR triplex pump does offer a higher PSI at the nozzle, but the EOPE triplex pump is has the higher flow rate at 4.76 GPM. Despite these differences in output, either triplex pump would be a great choice for most applications.


Popular Topic on this Page:

Triplex Pump Review

Triplex Pump Video

What is a triplex pump?

How a Triplex Pump Works

Replacing a Triplex Pump Video


How a Triplex Pump Works Video

Here's a short but informative video that simply explains how a triplex pump works.


As you shop for a new pump for your pressure washer, you are bound to discover that there are three types of pumps available: wobble, axial cam, and triplex pumps. Each pump has its positive and negative aspects and there are proponents of each type of pump. The majority of people who use their pressure washer for extended hours each year, especially contractors, believe that a triplex pump is the best to have.

Today, we are going to look at a few of the features of each type of pump so that you can fully understand why a triplex pump is the choice of many commercial contractors.


Replacing a Triplex Pump Video

Even though triplex pumps are engineered to give you a long working life, eventually, every pump must be replace on your pressure washer.

As you can see from this video, replacing a triplex pump is something that any homeowner can do for themselves.


3 Types of Pressure Washer Pumps

pressure washer pump

As we said above, pressure washers are equipped with one of three types of pump: wobble, axial cam, or a triplex plunger pump. Each of these pumps has its own unique qualities that make it a decent option, but the triplex plunger pump stands head-and-shoulders above the other two. Let's have a look at why.

  • Wobble Pump: wobble pumps are inexpensive to produce and use the least efficient method of pumping water. They create the lowest pressure and usually last just 300 working hours. The main benefit of using a wobble pump in a pressure washer is that they are cheap, making a basic pressure washer affordable for many homeowners. Unfortunately, once a wobble pump fails, the entire pressure washer has to be replaced.
  • Axial Cam Pump: axial cam pumps are more powerful than wobble pumps. An axial pump is built with larger bearings than a wobble pump and has an oil reserve. These two features allow them to run harder and longer than a wobble pump. Axial pumps should last for 600 working hours and can be serviced to a degree, extending their usefulness.  
  • Triplex Pump: a triplex pump is a heavy-duty pressure washer pump. These pumps are attached to professional level pressure washers. A triplex pump has a longer life if it is serviced and maintained correctly. The design of a triplex pump allows it to be more efficient than the other types of pump, so it can create higher pressures and force a high number of gallons per minute through the spray nozzle.

As you can see, a triplex plunger pump stands out because of it higher pressures, larger volume of water it can pump per minute, and its longevity.

If you'd like to learn more about the differences between an axial cam vs triplex pump, you can read more on my Axial Cam vs Triplex Pump Page.

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