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AAA 90034 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4400 PSI, 4.0 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black
Purchase options and add-ons
Brand | SIMPSON |
Color | Black |
Material | Brass |
Style | Pressure Washer Pump |
Product Dimensions | 11.5"L x 11.5"W x 11"H |
Power Source | Gas Powered |
Item Weight | 16 Pounds |
Maximum Flow Rate | 4 Gallons Per Minute |
About this item
- Extend the life of your pressure washer: Save money by replacing your pump instead of buying a whole new power washer. This easy-to-install kit is great for power washers that can support 4400 PSI at 4.0 GPM to wash walls, sidewalks, vehicles, and more
- Compatibility: SAE standard bolt pattern fits many gas pressure washers with horizontal engines. To ensure compatibility, be sure to match engine orientation, PSI, GPM, engine shaft diameter, and current pump inlet and outlet connection
- Adjustable power: Pump includes PowerBoost Technology that delivers higher pressure at the nozzle for a more efficient cleaning experience; There is also a hand turn knob that lets you reduce power at your convenience for tasks that require lower pressure
- Know when to change your oil: The sight glass and advanced oil seal technology eliminates the need for a dipstick. With visibility to the oil level and the oil itself, you can easily see when oil levels are low or if water has clouded the oil
- Standard Connections: This replacement pump features a garden hose inlet and quick connect high pressure hose outlet; Use it with many pressure washer hoses, including Simpson Armor 41114, 41096, 41115 or Simpson Monster 41113, 41028, 41030, 41032, 41034
Frequently bought together
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This Item SIMPSON AAA 90034 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4400 PSI, 4.0 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | |
Price | $379.99$379.99 | -17% $199.99$199.99 List: $239.99 | -8% $229.99$229.99 List: $249.98 | -29% $159.89$159.89 List: $224.55 | -24% $149.99$149.99 List: $196.99 | $69.99$69.99 |
Delivery | Get it as soon as Sunday, Mar 31 | Get it as soon as Monday, Apr 1 | Get it as soon as Sunday, Mar 31 | Get it as soon as Monday, Apr 1 | Get it as soon as Sunday, Mar 31 | Get it as soon as Sunday, Mar 31 |
Customer Ratings | ||||||
Easy to install | 4.3 | 4.3 | 4.3 | 4.5 | 4.7 | 4.8 |
Value for money | 2.8 | 3.7 | 3.7 | 4.3 | 4.3 | 4.6 |
Longevity | — | 3.2 | 3.2 | 4.2 | 3.9 | 4.2 |
Sold By | Amazon.com | TOOLCY | TOOLCY | Amazon.com | Amazon.com | YAMATIC Power Center |
power source | Gas Powered | Engine Powered | Engine Powered | manual, gasoline | Gas Powered | engine |
material | Brass | Aluminum, Brass | Aluminum | Brass | Brass, steel | Aluminum, Brass |
style | Pressure Washer Pump | 4000 PSI Max | 3800-4000 PSI Pressure Washer Pump | 1" Shaft Triplex | Horizontal | Axial |
maximum flow rate | 4 gallons per minute | 4.2 gallons per minute | 4.4 gallons per minute | 4 gallons per minute | 2.5 gallons per minute | 2.5 gallons per minute |
weight | 16 pounds | — | — | 20 pounds | 7 pounds | 5 pounds |
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Product guides and documents
From the manufacturer
With over 60 years of industry-leading experience built into each of our products, it is easy to see why backyard heroes and job site champions everywhere prefer the SIMPSON Advantage.
- 60 years of innovation and technology breakthroughs
- Replacement parts to extend the life of your machines
- Accessories to expand the uses
- Solutions for every shopper, from DIY to large industry
AAA 90034 Horizontal Triplex Plunger Replacement Pump Kit for Gas Powered Pressure Washers
Designed to fit most makes and models of gas pressure washers with horizontal engines
Designed for performance, the AAA PROFESSIONAL triplex pump rated up to 4400 PSI @ 4.0 GPM is highly efficient. It minimizes engine load while delivering top performance. The 90034 contains dual oversized ball bearings for better wear, friction resistance and longer-lasting performance in the toughest cleaning environment. Comes equipped with the Easy-Start feature and is rated up to 4400 PSI @ 4.0 GPM.
- 4400 PSI, 4.0 GPM, 1" Shaft
- PowerBoost Technology delivers higher pressure at the nozzle
- Fully adjustable unloader system with ergonomic control
- Thermal relief protection to prevent the pump overheating
AAA Replacement Pump Kit Features
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Easy ConnectionsThe Garden Hose Inlet and QC high pressure outlet make for a simple setup to get your power washer up and running in no time |
Standard Mounting OptionsThe SAE standard bolt pattern fits most gas-powered pressure washers and simplifies the installation to start working as quickly as possible |
Check Oil LevelSight glass and advanced oil seal technology eliminates the need for a dipstick |
Pump Kit Comes Fully PlumbedWhat's Included:
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Adjustable PowerThe hand turn knob lets you reduce power at your convenience for tasks that require lower pressure |
Premium Construction
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Specs and Dimensions
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Shop Amazon for Genuine Simpson ProductsAlways make sure the product says these two things to get the highest quality Simpson products on Amazon:
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Learn More | Learn More | Learn More | Learn More | Learn More | |
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Customer Reviews |
4.1 out of 5 stars
209
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4.4 out of 5 stars
193
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4.4 out of 5 stars
912
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4.4 out of 5 stars
912
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4.4 out of 5 stars
912
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PSI | 4400 | 3200 | 3700 | 3800 | 4000 |
GPM | 4.0 | 2.8 | 2.5 | 3.5 | 3.5 |
Shaft | 1" | 3/4" | 3/4" | 1" | 1" |
Orientation | Horizontal | Horizontal | Horizontal | Horizontal | Horizontal |
Hardware included | ✓ | ✓ | ✓ | ||
Connection | QC | M22 | M22 | QC | QC |
Sight Glass to Check Oil Level | ✓ | ✓ | ✓ | ✓ | ✓ |
Easy Start | ✓ | ✓ | ✓ | ✓ | ✓ |
Power Boost | ✓ | ✓ | ✓ | ✓ | ✓ |
From the brand
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The SIMPSON Advantage
Driven by Performance for more than 50 years, SIMPSON continues to provide the advantage you need to get the job done right every time. We design, engineer and manufacture products that are reliable, durable, and built to perform every time you need them. Whether you are a DIYer or an industry pro, SIMPSON offers an enhanced experience with professional results guaranteed.
Join the historic journey and take the ADVANTAGE!
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AAA Triplex Plunger Pump Kits
AAA Triplex Plunger pumps feature universal connections, a sight glass to view oil level and quality, and SAE bolt mounting patterns.
Save money by replacing your pump instead of buying a whole new pressure washer.
- Easy-to-install Kit
- SAE Standard Bolt Pattern
- PowerBoost Technology
- Sight Glass to view oil levels
- Adjustable Unloader
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Are AAA pumps for horizontal or vertical mounting configuration?
Both options are available. Check each product page to make sure it matches your engine.
What is included in the replacement kit?
The pump kits come fully plumbed and include the following: Pump, Mounting Hardware (nuts and bolts), Siphon Hose with Filter, Shaft Key, Instructions
What power features are on AAA pumps?
PowerBoost Technology delivers higher pressure at the nozzle for a more efficient cleaning experience. There is also a hand turn knob that lets you manage power at your convenience for each project.
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OEM Axial Cam Pump Kits
OEM Axial Cam pumps feature universal connections, maintenance-free construction, and Thermal Relief Valves for durability.
Save money by replacing your pump instead of buying a whole new pressure washer.
- Easy-to-install Kit
- SAE Standard Bolt Pattern
- Maintenance-free Crankcase
- Die-cast Aluminum
- Easy Start Unloader
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What makes a pump maintenance free?
Maintenance-free pumps contain long-wear components submerged in a high-grade synthetic oil designed to last the life of the pump. Since the pump does not require regular oil changes, they are called maintenance-free.
What is a thermal relief valve (TRV)?
Our pumps are equipped with a TRV. This is a safety feature that keeps the pump from overheating while in bypass mode. The thermal relief valve opens if the water temperature inside the pump gets too hot. This will cause the valve to open, allowing hot water to exit and cooler water to enter the pump.
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How do I winterize the pressure washer pump?
Use SIMPSON Pump Guard when storing the unit for more than 30 days or when freezing temperatures are expected. Using pump guard helps provide proper lubricant to the internal seals of the pump regardless of temperature while also removing water from the pump that could cause damage due to freezing. Follow the instructions in your manual on how to properly winterize the pump.
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What is recommended for pressure washer winter storage?
Disconnect the high-pressure hose from the pump and the spray gun and allow the water to drain from the hose or use high-pressure air to force the water out. After water is removed, coil the hose onto the hose wrap. Hold the spray gun and wand in a vertical position and squeeze the trigger to remove any water then place the spray gun back into the gun holder. . Winterize the pump using SIMPSON Pump Guard as per your instruction manual
Videos
Videos for this product
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AAA Pump Installation Overview 2022
FNA Group, Inc.
Product information
Brand | SIMPSON |
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Color | Black |
Material | Brass |
Style | Pressure Washer Pump |
Product Dimensions | 11.5"L x 11.5"W x 11"H |
Power Source | Gas Powered |
Item Weight | 16 Pounds |
Maximum Flow Rate | 4 Gallons Per Minute |
Item Weight | 16 pounds |
Manufacturer | simpson |
ASIN | B01D4X0CCK |
Country of Origin | China |
Item model number | 90034 |
Customer Reviews |
4.1 out of 5 stars |
Best Sellers Rank | #78,431 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #44 in Pressure Washer Pumps #814 in Pressure Washer Accessories |
Is Discontinued By Manufacturer | No |
Warranty & Support
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Product Description
Engineered to surpass expectations, the 90034 AAA Professional Triplex Pump is highly efficient and minimizes engine load while delivering top performance. This easy-to-install pump replacement kit is for gas pressure washers* with a horizontal engine and a 1" diameter shaft, such as the Honda GX390. This pump can produce up to 4400 PSI at 4.0 GPM. The 90034 is designed with dual oversized ball bearings to reduce friction and allow for long lasting performance in the toughest cleaning environments. The 90034 features a stainless steel integrated unloader featuring our easy-start system. (*Check your pressure washer's inlet and outlet orientation to ensure compatibility)
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the ease of installation of the water pump. For example, they mention it bolts right on and works perfectly. That said, some complain about the oil resistance and durability. They say it leaks oil and comes completely apart. Opinions are mixed on quality.
AI-generated from the text of customer reviews
Customers find the installation of the water pump to be easy. They mention that it bolts right on, and has worked perfectly since installed.
"It was very easy to change out and has worked perfectly since installed" Read more
"...It was super easy to install but didn't last past 3 uses. At that point it started to get water pushed back into the crank area of the pump...." Read more
"...It replaced an AAA model EW4040. It easily bolted right on and I ran it for 2 hours with no problem. Hopefully it’ll last a long time." Read more
"Easy as heck to install, only 4 bolts! There wasn’t even a set screw on the shaft...." Read more
Customers are mixed about the quality of the water pump. Some mention that it works great, while others say that it has factory problems and does not work. The valve is made of cheap low grade brass and the spring is even lower grade steel.
"It was very easy to change out and has worked perfectly since installed" Read more
"...I contacted Amazon and the pump was not returnable which is a big downfall and I’m working with a repair company getting it repaired under warranty..." Read more
"Been using commercially for 3 months now. No issues...." Read more
"...All of my pumps get bimonthly maintenance. The valve is a cheap low grade brass the spring is even a lower grade steel...." Read more
Customers are dissatisfied with the oil resistance of the water pump. They mention that the seal is leaking water in the oil, and water leaks out of the pump upon installation. Some customers also report that the pump has factory problems and mismatched parts. The pump starts gushing water out of its unloader and the oil gets milky within the first 10 minutes.
"...At that point it started to get water pushed back into the crank area of the pump...." Read more
"...I thought the pump worked excellent except for a water drip coming out of the pump and then I noticed the oil got milky within the first 10 minutes..." Read more
"...installed it , lubed it and ran it at 3900 psi the thermal relief valve started leaking constantly..." Read more
"...I've had it for three weeks and the seal is leaking water in the oil. Amazon may said you can return it BUT that is a lie...." Read more
Customers are dissatisfied with the durability of the water pump. They mention that it fails after three uses, has no warranty, and comes completely apart.
"...It was super easy to install but didn't last past 3 uses. At that point it started to get water pushed back into the crank area of the pump...." Read more
"DO NOT BUY this AAA Pump because it will fail. I've had it for three weeks and the seal is leaking water in the oil...." Read more
"...I’ve had one of the one year old pumps come completely apart, throwing parts and oil in all directions...." Read more
"Pump came quick but did not work after being installed very disappointed" Read more
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Top reviews
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The old pump was seized onto the drive shaft, had to gently tap it off with a hammer. Didn’t want this to happen again so I made sure to reinstall with anti-seize.
Washer is so strong I now worry about blasting paint off of my pickup! Lol!
I contacted Amazon and the pump was not returnable which is a big downfall and I’m working with a repair company getting it repaired under warranty but it’ll be down for several weeks or months waiting on parts.
Watch out when you order big ticket items from Amazon that it is returnable or not. In my books Amazon is still a great company I just got caught on this one.