---
product_id: 17366072
title: "AAA Pumps 90038 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 3800 PSI, 3.5 GPM, 1\" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black"
brand: "simpson"
price: "2005.52 DT"
currency: TND
in_stock: true
reviews_count: 9
category: "Simpson"
url: https://www.desertcart.tn/products/17366072-aaa-pumps-90038-horizontal-triplex-plunger-replacement-pressure-washer-pump
store_origin: TN
region: Tunisia
---

# 3.5 GPM flow rate SAE standard bolt pattern 3800 PSI max pressure AAA Pumps 90038 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 3800 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black

**Brand:** simpson
**Price:** 2005.52 DT
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your clean game—replace, don’t replace your washer!

## Quick Answers

- **What is this?** AAA Pumps 90038 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 3800 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black by simpson
- **How much does it cost?** 2005.52 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/17366072-aaa-pumps-90038-horizontal-triplex-plunger-replacement-pressure-washer-pump)

## Best For

- simpson enthusiasts

## Why This Product

- Trusted simpson brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Oil Sight Glass & Advanced Seal:** Monitor oil levels instantly—no dipstick needed, avoid costly pump damage.
- • **Adjustable Pressure Control Knob:** Dial down power for delicate surfaces or ramp up for tough grime with one hand.
- • **Durable Dual Oversized Ball Bearings:** Engineered to reduce friction and extend pump life in demanding environments.
- • **PowerBoost Technology for Peak Cleaning:** Get superior pressure at the nozzle for faster, deeper clean every time.
- • **Universal SAE Bolt Pattern Compatibility:** Fits most gas pressure washers with horizontal engines—easy swap, no hassle.

## Overview

The Simpson 90038 AAA Professional Triplex Pump is a high-performance, easy-to-install replacement pump designed for gas pressure washers with horizontal engines. Delivering up to 3800 PSI at 3.5 GPM, it features PowerBoost Technology for enhanced cleaning power, a universal SAE bolt pattern for broad compatibility, and an innovative oil sight glass for effortless maintenance. Built with durable dual oversized ball bearings and a stainless steel unloader, this pump ensures long-lasting, efficient operation backed by a 5-year warranty.

## Description

Engineered to surpass expectations, the 90038 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 GX270. This pump can produce up to 3800 PSI at 3.5 GPM. The 90038 is designed with dual oversized ball bearings to reduce friction and allow for long lasting performance in the toughest cleaning environments. The 90038 features a stainless steel integrated unloader featuring our easy-start system. (*Check your pressure washer's inlet and outlet orientation to ensure compatibility)

Review: Replacement - Easy to install. Matched right up with the old pump. Working as should.
Review: Works as described - Fast install works great on dewalt 3800 psi with Honda 270 engine

## Features

- 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 3800 PSI at 3.5 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00TQLMPF2 |
| Best Sellers Rank | #72,562 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #38 in Pressure Washer Pumps |
| Brand Name | SIMPSON |
| Color | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (397) |
| Flow Rate | 3.5 Gallons Per Minute |
| Global Trade Identification Number | 00879399002083 |
| Included Components | Pump Kit |
| Item Dimensions L x W x H | 12"L x 10"W x 7.5"H |
| Item Type Name | Replacement Pressure Washer Pump Kit, 3800 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines |
| Item Weight | 14 Pounds |
| Manufacturer | simpson |
| Manufacturer Warranty Description | 5 year warranty |
| Material Type | Brass |
| Maximum Lifting Height | 22 Meters |
| Model Number | 90038 |
| Power Source | Gas Powered |
| Product Style | 3800 PSI at 3.5 GPM |
| UPC | 879399002083 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** SIMPSON
- **Color:** Black
- **Global Trade Identification Number:** 00879399002083
- **Item Weight:** 14 Pounds
- **Material:** Brass
- **Maximum Flow Rate:** 3.5 Gallons Per Minute
- **Maximum Lifting Height:** 22 Meters
- **Power Source:** Gas Powered
- **Product Dimensions:** 12"L x 10"W x 7.5"H
- **Style:** 3800 PSI at 3.5 GPM

## Images

![AAA Pumps 90038 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 3800 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black - Image 1](https://m.media-amazon.com/images/I/71UfvYTtB6L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Replacement
*by G***T on September 16, 2025*

Easy to install. Matched right up with the old pump. Working as should.

### ⭐⭐⭐⭐⭐ Works as described
*by G***E on July 6, 2025*

Fast install works great on dewalt 3800 psi with Honda 270 engine

### ⭐⭐⭐⭐⭐ Nice pump!!
*by K***E on January 28, 2025*

Replaced pump on a Honda engine power washer. Working great. Very easy to install once you get the old pump off.

## Frequently Bought Together

- AAA Pumps 90038 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 3800 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black
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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-05-07*