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- USA
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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Description
Simpson 90037 3400 Psi 2.5 Gpm AAA Technologies Triplex Plunger Pump KitFeatures 3400 PSI @ 2. 5 GPM PowerBoost Technology Fully adjustable unloader system with ergonomic control Sight glass and advanced oil seal technology, does away with the need for a dipstick Thermal relief protection to prevent pump overheating Dual oversized radial ball bearings are installed for better wear, friction resistance and precision ceramic coated pistons for extended seal life Crankcase is manufactured from fully anodized die cast
Features
- 3400 PSI @ 2.5 GPM
- PowerBoost Technology
- Fully adjustable unloader system with ergonomic control
- Sight glass and advanced oil seal technology, does away with the need for a dipstick
- Thermal relief protection to prevent pump overheating
- Dual oversized radial ball bearings are installed for better wear, friction resistance and precision ceramic coated pistons for extended seal life
- Crankcase is manufactured from fully anodized die cast aluminum for corrosion protection and is sealed to prevent contamination and lube failure
- Gas engine flange and hollow shaft that fits most horizontal shaft engines
What's in The Box
- AAA Triplex Plunger Pump
- Inlet/Outlet Connections
- Siphon Tube w/ Filter
- New Mounting Bolts
- Shaft Key
- Owner's Manual
Warranty
- 5-Year Limited Factory Warranty
- 30 Day Satisfaction Guaranteed
Specifications
| Sku | 90037 |
| Brand | Simpson |
| Max Pressure | 3,400 Psi |
| Gallons Per Minute | 2.5 Gpm |
| Inlet Port | 3/4 in. GH |
| Discharge Port | Threaded Male Fitting |
| Inlet Pressure Range | 10-60 Psi |
| Thermal Relief Port | 1/4 in. NPT |
| Shaft Diameter | 3/4 in. |
| Flange Bolt Pattern | SAE J-609A |
| Key Way | 3/16 in. |
| Pump Oil Capacity | 8.0 fl-oz. |
| Power Boost | Yes |
| Head Material | Brass |
| Shipping Weight | 9 lbs. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 134 reviews
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Product Reviews
★★★★★ 5
Worth it for peace of mind to have in car
Works as described. Have used twice now. Takes a few minutes but will put air in tire. The cord is long enough to reach every tire.
Certainly loud when using
car must be on to use
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Reviewed in the United States on February 19, 2026
★★★★★ 5
Great true inflator
Great tire inflator also own a jumper pack in this brand, easy to use and great function to set the disired psi and auto shut off.
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Reviewed in the United States on January 18, 2026
★★★★★ 5
Delivers great PSI for a small package
Unit works great ! I love the fact you can preset the psi. cut off ( I had to pump up some air shocks to 135 the unit did it with no problem ! )
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Reviewed in the United States on May 6, 2026
★★★★★ 4
Good inflator
Not the best one but works well!
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Excellent Value for Price
I highly recommend one of these in your vehicle for emergencies. Don't fall for those handheld cordless ones you see on social media. Those will only inflate 1-2 tires before depleting. You have unlimited power for the plugins and it will inflate at least 4x faster.
The AstroAI is compact, lightweight and powerful for its price. Everything folds into its rectangular form factor for easy storage. The UI is simple and to the point. You can easily set the target pressure and it will auto stop. It's also a nice looking design with black and yellow which are common colors for power tools and emergency equipment.
If I were being picky, the 2 minor cons that you'll find in other brands are: no option to plug into wall outlet & doesn't come with a case or bag.
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Reviewed in the United States on November 22, 2025