---
product_id: 17071690
title: "- AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4\" Shaft, Horizontal Engine Fit, PowerBoost (90037)"
brand: "simpson"
price: "$16458"
currency: MXN
in_stock: true
url: https://www.desertcart.mx/products/17071690-aaa-3700-psi-2-5-gpm-replacement-triplex-pressure-washer
store_origin: MX
region: Mexico
---

# 2.5 GPM 3/4" Shaft 3700 PSI - AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4" Shaft, Horizontal Engine Fit, PowerBoost (90037)

**Brand:** simpson
**Price:** $16458
**Availability:** ✅ In Stock

## Summary

> 🔧 Revive Your Pressure Washer: Power Up Your Cleaning Game!

## Quick Answers

- **What is this?** - AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4" Shaft, Horizontal Engine Fit, PowerBoost (90037) by simpson
- **How much does it cost?** $16458 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/17071690-aaa-3700-psi-2-5-gpm-replacement-triplex-pressure-washer)

## 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

- • **Compatibility is Key:** Fits a wide range of gas pressure washers with horizontal engines.
- • **Oil Level Visibility:** Advanced sight glass technology for easy oil monitoring.
- • **Standard Connections:** Compatible with various pressure washer hoses for seamless use.
- • **PowerBoost Technology:** Experience enhanced cleaning efficiency with adjustable pressure.
- • **Extend Your Power Washer's Life:** Save money and time by replacing just the pump!

## Overview

The AAA 90037 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit is designed for industrial gas-powered machines, delivering a powerful 3700 PSI at 2.5 GPM. This easy-to-install kit includes essential hardware and a siphon tube, ensuring compatibility with many gas pressure washers. With features like PowerBoost Technology for adjustable pressure and advanced oil monitoring, this pump kit is the perfect solution to extend the life of your pressure washer.

## Description

AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4" Shaft, Horizontal Engine Fit, PowerBoost (90037)

## 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 3700 PSI at 2.5 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 threaded M22 connection high pressure hose outlet; Use it with many pressure washer hoses, including Simpson MorFlex models 40224, 40225, 40226 and Santoprene model 41182

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 9 Pounds |
| Item Dimensions L x W x H | 12"L x 9"W x 4"H |
| Material Type | Brass |
| Style Name | 3700 PSI at 2.5 GPM |
| Color | Black |
| Maximum Lifting Height | 22 Meters |
| Flow Rate | 2.5 Gallons Per Minute |
| Power Source | Gas Powered |

## Product Details

- **Brand:** SIMPSON
- **Color:** Black
- **Material:** Brass
- **Style:** 3700 PSI at 2.5 GPM
- **Product Dimensions:** 12"L x 9"W x 4"H
- **Power Source:** Gas Powered
- **Item Weight:** 9 Pounds
- **Maximum Flow Rate:** 2.5 Gallons Per Minute
- **Maximum Lifting Height:** 22 Meters
- **Voltage:** 120

## Images

![- AAA 3700 PSI 2.5 GPM Replacement Triplex Pressure Washer Pump Kit for SIMPSON Gas Power Washer Pumps, 3/4" Shaft, Horizontal Engine Fit, PowerBoost (90037) - Image 1](https://m.media-amazon.com/images/I/71Dz7TCDcgL.jpg)

## Frequently Bought Together

- AAA 90037 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 3700 PSI, 2.5 GPM, 3/4" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black
- Valley Industries Pressure Washer Premium Pump Oil - 1 Liter, Black, (PK-85490000)
- STA-BIL Pump Protector - Protects Pressure Washer Pumps and Other Internal Components During Storage, Next Gen Anti-Freeze and Lubricant Formula, 4oz (22007)

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**Shop now:** [https://www.desertcart.mx/products/17071690-aaa-3700-psi-2-5-gpm-replacement-triplex-pressure-washer](https://www.desertcart.mx/products/17071690-aaa-3700-psi-2-5-gpm-replacement-triplex-pressure-washer)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-03-22*