---
product_id: 2202414
title: "S4000B 4-Outlet Aquatic Air Pump, 9W 4x3.2L/min"
brand: "boyu"
price: "€ 19.58"
currency: EUR
in_stock: false
reviews_count: 8
url: https://www.desertcart.fi/products/2202414-s4000b-4-outlet-aquatic-air-pump-9w-4x3-2l-min
store_origin: FI
region: Finland
---

# 9W Power 4x3.2L/min Output Silent Operation S4000B 4-Outlet Aquatic Air Pump, 9W 4x3.2L/min

**Brand:** boyu
**Price:** € 19.58
**Availability:** ❌ Out of Stock

## Summary

> 🌊 Dive into Serenity with BOYU!

## Quick Answers

- **What is this?** S4000B 4-Outlet Aquatic Air Pump, 9W 4x3.2L/min by boyu
- **How much does it cost?** € 19.58 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/2202414-s4000b-4-outlet-aquatic-air-pump-9w-4x3-2l-min)

## Best For

- boyu enthusiasts

## Why This Product

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

## Key Features

- • **Reliable & Durable:** Crafted from high-quality plastic for long-lasting use.
- • **Compact & Lightweight:** Perfectly sized at 9.2 x 6.4 x 4.4 inches and only 2.65 lbs.
- • **Customizable Air Flow:** Easily adjust air flow to suit your aquarium's needs.
- • **Unmatched Performance:** Experience high-end performance without breaking the bank.
- • **Whisper-Quiet Technology:** Enjoy a serene aquatic environment with silent operation.

## Overview

The BOYU S4000B 4-Outlet Aquatic Air Pump is a budget-friendly powerhouse designed for aquarium aeration. With a 9W power output and a remarkable 4x3.2L/min air flow, it ensures your aquatic life thrives. Its adjustable air flow controller and silent operation make it an ideal choice for any aquarium enthusiast.

## Description

This sleek, silent pump is more powerful than many of its competitors. Its high outlet pressure makes it suitable for deeper aquariums. Made with high quality, heavy-duty plastic with rubber feet and air port. Water resistant and durable.

## Features

- Budget-friendly aquarium air pumps boast high end performance
- silent operation and dependable air output
- Use for aquarium aeration and driving air-driven filters and accessories
- Adjustable Air Flow controller
- Power: 9W, Pressure: 0.012 MPa output: 4 x 3.2L/min

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 9.2 x 6.4 x 4.4 inches |
| Package Weight | 2.65 Pounds |
| Brand Name | BOYU |
| Material | Plastic |
| Manufacturer | BOYU |
| Part Number | yub-8309 |
| Size | S4000B |

## Product Details

- **Brand:** BOYU
- **Material:** Plastic
- **Power Source:** Corded Electric
- **Operation Mode:** Automatic
- **Manufacturer:** BOYU

## Images

![S4000B 4-Outlet Aquatic Air Pump, 9W 4x3.2L/min - Image 1](https://m.media-amazon.com/images/I/41se1vbvVdL.jpg)
![S4000B 4-Outlet Aquatic Air Pump, 9W 4x3.2L/min - Image 2](https://m.media-amazon.com/images/I/41gMhqJ8ZPL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Power at a great price!
*by N***U on May 23, 2013*

Awesome air pump. I originally had 2 small units to cover my 120 gal tank. This unit does the job alone, works great! The only downside is the noise.. The upside is you can just turn the airflow down at bedtime to quiet the noise.. My Oscar and Plecho seem to be more energetic as their tank is well oxygenated...., Highly recommend!

### ⭐ Did not last
*by B***R on August 11, 2013*

Great product, but it is a tad bit louder than I expected. I eventually got used to the humming. Very convenient since it has four outlets, but requires only one plug in. It is like having 4 pumps, saving you room for 3 extra plug-ins for other devices.*UPDATE*Pump isn't quite what I expected after a couple of months. Does not produce the same amount of air as it did orginally. Checked hoses and blew in them to make sure there was no blockage, bubbles blew through just fine. Hooked up BOYU and still didn't work. Eventually tranfered my 2 Whisper Pumps (made for only 60 Gallons each, with 2 outlets per pump) from my 75 gallon tank to the 180 gallon, and they produced much stronger bubbles, no problems, and not quite as loud.

### ⭐⭐ Started out working ok, then t started making a loud sound
*by S***T on July 22, 2013*

I bought this, as the description said its quiet, and everything, which it was for the first week of use. It now makes a buzzing noise, and a loud vibration sound. I have my tanks in my bedroom, so the noise wasn't acceptable to hear when trying to sleep. I would not recommend this air pump.

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**Shop now:** [https://www.desertcart.fi/products/2202414-s4000b-4-outlet-aquatic-air-pump-9w-4x3-2l-min](https://www.desertcart.fi/products/2202414-s4000b-4-outlet-aquatic-air-pump-9w-4x3-2l-min)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-26*