---
product_id: 165555150
title: "90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1\" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black"
brand: "simpson"
price: "R22647"
currency: ZAR
in_stock: true
url: https://www.desertcart.co.za/products/165555150-90039-horizontal-triplex-plunger-replacement-pressure-washer-pump-kit-4000
store_origin: ZA
region: South Africa
---

# 4000 PSI power 3.5 GPM flow rate Easy installation 90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black

**Brand:** simpson
**Price:** R22647
**Availability:** ✅ In Stock

## Summary

> 💪 Power Up Your Clean! Unleash the potential of your pressure washer.

## Quick Answers

- **What is this?** 90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black by simpson
- **How much does it cost?** R22647 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/165555150-90039-horizontal-triplex-plunger-replacement-pressure-washer-pump-kit-4000)

## 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 many gas pressure washers with horizontal engines.
- • **Oil Level Visibility:** No more dipsticks—just check the sight glass!
- • **Standard Connections:** Compatible with various pressure washer hoses.
- • **PowerBoost Technology:** Experience enhanced cleaning efficiency.
- • **Extend Your Pressure Washer's Life:** Save money by replacing just the pump!

## Overview

The AAA 90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit is designed for industrial gas-powered machines, delivering an impressive 4000 PSI and 3.5 GPM. This kit includes all necessary hardware and a siphon tube, ensuring easy installation and compatibility with a wide range of pressure washers. With features like PowerBoost Technology and a sight glass for oil level monitoring, this pump is the perfect upgrade for efficient and effective cleaning.

## Description

90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black

## 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 4000 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 |
|---------------|-------|
| Product Dimensions | 27.94 x 27.94 x 19.05 cm; 6.35 kg |
| Part number | 90039 |
| Item display weight | 7.22 kg |
| Material type | Brass |
| Power source type | Gas Powered |
| Manufacturer | SIMPSON |
| Item model number | 90039 |
| ASIN | B00TQLMPM0 |

## Product Details

- **Brand:** SIMPSON
- **Colour:** Black
- **Material:** Brass
- **Style:** 4000 PSI at 3.5 GPM
- **Product dimensions:** 27.9L x 27.9W x 19.1H centimetres
- **Power source:** Gas Powered
- **Item weight:** 14 Pounds
- **Maximum flow rate:** 3.5 Gallons Per Minute
- **Global Trade Identification Number:** 00879399002090
- **Manufacturer:** SIMPSON

## Images

![90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 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)
![90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black - Image 2](https://m.media-amazon.com/images/I/81VdfNXsI6L.jpg)
![90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black - Image 3](https://m.media-amazon.com/images/I/81wQpa38o9L.jpg)
![90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black - Image 4](https://m.media-amazon.com/images/I/81MOJy4nuYL.jpg)
![90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines, Black - Image 5](https://m.media-amazon.com/images/I/81xGC9O7ZVL.jpg)

## Frequently Bought Together

- AAA 90039 Horizontal Triplex Plunger Replacement Pressure Washer Pump Kit, 4000 PSI, 3.5 GPM, 1" Shaft, Includes Hardware and Siphon Tube, for Industrial Gas Powered Machines
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**Shop now:** [https://www.desertcart.co.za/products/165555150-90039-horizontal-triplex-plunger-replacement-pressure-washer-pump-kit-4000](https://www.desertcart.co.za/products/165555150-90039-horizontal-triplex-plunger-replacement-pressure-washer-pump-kit-4000)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-21*