---
product_id: 18523781
title: "Blue Diamond ET 120 Septic or Pond Linear Diaphragm Air Pump"
brand: "blue diamond pumps"
price: "AR$994590"
currency: ARS
in_stock: true
reviews_count: 8
category: "Blue Diamond Pumps"
url: https://www.desertcart.com.ar/products/18523781-blue-diamond-et-120-septic-or-pond-linear-diaphragm-air
store_origin: AR
region: Argentina
---

# 90W energy efficient 120 L/min airflow easy service & spares Blue Diamond ET 120 Septic or Pond Linear Diaphragm Air Pump

**Brand:** blue diamond pumps
**Price:** AR$994590
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your ecosystem with silent, powerful airflow — because your pond and septic deserve the best!

## Quick Answers

- **What is this?** Blue Diamond ET 120 Septic or Pond Linear Diaphragm Air Pump by blue diamond pumps
- **How much does it cost?** AR$994590 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/18523781-blue-diamond-et-120-septic-or-pond-linear-diaphragm-air)

## Best For

- blue diamond pumps enthusiasts

## Why This Product

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

## Key Features

- • **Energy-Smart Design:** Runs efficiently on just 90 watts, balancing power with cost savings.
- • **Whisper-Quiet Operation:** Enjoy near-silent performance that won’t disrupt your outdoor tranquility.
- • **Powerful 120 L/min Airflow:** Maximize oxygenation with a robust 4.24 CFM output for septic or pond health.
- • **Weatherproof & Durable Build:** Engineered with specially formulated diaphragm material and bronze fittings for long-lasting reliability.
- • **Simple Installation & Maintenance:** Comes complete with fittings and a competitively priced diaphragm kit for hassle-free upkeep.

## Overview

The Blue Diamond ET 120 is a compact, weatherproof linear diaphragm air pump delivering 120 liters (4.24 CFM) of clean, oil-free air per minute at 0.10 bar pressure. Designed for septic system oxygenation and pond aeration, it operates quietly on 90 watts and features durable bronze fittings and a long-life diaphragm. Easy to install and maintain with available spare kits, it’s backed by a 2-year warranty and trusted for continuous, reliable performance.

## Description

SEPTIC SYSTEM IMPROVEMENTBlue Diamond's Enviro ET120 air pump adds the oxygen to septic system wastewater that aerobic bacteria require to decompose organic matter. The air that the pump adds is clean and free of oil. This pump also can be used to aerate pond water. Making little noise as it runs, the pump puts out a maximum 4.24 cubic feet / 120 liters of air per minute. Its maximum pressure is 0.10 bar. It uses 90 watts of electricity. Its connector size is 0.71 inch OD.WEATHERPROOF AND STRONGSupported by a 2 year warranty, this air pump is designed to be durable. It is weatherproof, and its sturdy construction includes material specially formulated for its linear diaphragm.SIMPLE TO USE AND MAINTAINThis pump comes complete with a 1/2" ID bronze fitting and is easy to set up. It is easily serviceable with replaceable diaphragm kits (sold separately) to give the pump a long life.Put the Blue Diamond Enviro ET 120 air pump to work in your septic system or pond. Please Note: For applications requiring more than 33 ft. of tubing please contact us. Click "Add to Cart" now!

Review: Outstanding product - I bought this to replace a Gast pump (rocker piston aerator pump) that served me well for many years. I chose this because the Gast pump, although very good, was also very noisy. I placed this in a bench housing on the pond dock and coverd it with a large aluminium duct piece opened ,to shelter it from rain. You can hardly hear the pump and the amount of air it moved was considerably better than the Gast pump. I have had it for 3 weeks and am very happy with it. I have a similar smaller diaphragm pump for my Koi pond and it has lasted me for over 5 years. It is very easy to rebuild these diaphragm pumps and they work 24/7 for over a year before you need to replace the diaphragm. The rebuilding kit for the Gast pumps are expensive. I am thinking of buying a second one. Very impressed, and I would recommend this pump without reservations. Additional Information: It is now August 2020. Fourteen months after purchase. The pump has worked 24/7 and is still going strong. Just a little more noisy, still less than the Gast pumps. Just ordered the complete rebuilding kit $53 , shipping included. I am going to change the diaphragm before it breaks down. VERY DEPENDABLE pump, and my pond looks great.
Review: Works great and has held up well - We’ve been using this pump in our pond for a couple years and it works great. Well built, good power on the pump, and good value.

## Features

- 120 liters of air per minute.
- Easy to install complete with fittings.
- Specially formulated diaphragm material for long life.
- Robust and compact construction, weatherproof.
- Easy to service with competitively priced spares kit.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00JOU5Y0I |
| Best Sellers Rank | #192,386 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #665 in Water Garden & Pond Pumps |
| Brand | Blue Diamond Pumps |
| Color | Blue,bronze |
| Customer Reviews | 4.2 4.2 out of 5 stars (175) |
| EU Spare Part Availability Duration | 2 Years |
| Is Discontinued By Manufacturer | No |
| Item Weight | 21 pounds |
| Item model number | ET120 |
| Manufacturer | Blue Diamond Pumps |
| Material | Bronze |
| Maximum Flow Rate | 4.24 Cubic Feet Per Minute |
| Power Source | Electricity |
| Product Dimensions | 10.43"L x 8.36"W x 7.79"H |
| UPC | 724716529081 |

## Product Details

- **Brand:** Blue Diamond Pumps
- **Color:** Blue,bronze
- **EU Spare Part Availability Duration:** 2 Years
- **Item Weight:** 21 Pounds
- **Manufacturer:** Blue Diamond Pumps
- **Material:** Bronze
- **Maximum Flow Rate:** 4.24 Cubic Feet Per Minute
- **Power Source:** Electricity
- **Product Dimensions:** 10.43"L x 8.36"W x 7.79"H
- **UPC:** 724716529081

## Images

![Blue Diamond ET 120 Septic or Pond Linear Diaphragm Air Pump - Image 1](https://m.media-amazon.com/images/I/41tlbMfyGeL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Outstanding product
*by K***. on July 14, 2019*

I bought this to replace a Gast pump (rocker piston aerator pump) that served me well for many years. I chose this because the Gast pump, although very good, was also very noisy. I placed this in a bench housing on the pond dock and coverd it with a large aluminium duct piece opened ,to shelter it from rain. You can hardly hear the pump and the amount of air it moved was considerably better than the Gast pump. I have had it for 3 weeks and am very happy with it. I have a similar smaller diaphragm pump for my Koi pond and it has lasted me for over 5 years. It is very easy to rebuild these diaphragm pumps and they work 24/7 for over a year before you need to replace the diaphragm. The rebuilding kit for the Gast pumps are expensive. I am thinking of buying a second one. Very impressed, and I would recommend this pump without reservations. Additional Information: It is now August 2020. Fourteen months after purchase. The pump has worked 24/7 and is still going strong. Just a little more noisy, still less than the Gast pumps. Just ordered the complete rebuilding kit $53 , shipping included. I am going to change the diaphragm before it breaks down. VERY DEPENDABLE pump, and my pond looks great.

### ⭐⭐⭐⭐⭐ Works great and has held up well
*by T***. on February 1, 2025*

We’ve been using this pump in our pond for a couple years and it works great. Well built, good power on the pump, and good value.

### ⭐⭐⭐⭐⭐ Awesome, strong, great price !
*by M***T on January 5, 2020*

Love this awesome pump. After having to Replace my septic aerator pump 2 times in 10 years @ 500.00 a pop for a rebuild motor I decided to try this little guy for 1/2 the price. WOW.....What a difference ! Great little pump, low motor noise, strong air , and super easy to install! Great on my wallet too!

## Frequently Bought Together

- Blue Diamond ET 120 Septic or Pond Linear Diaphragm Air Pump
- Lostronaut Self Sinking Aeration Hose with Hose Clamps & Hose Menders for Easy Installation, Pond Aeration Tubing for Your Diffused Aeration System, Aerating Fountain, & Surface Aerator - 100' x 3/8"
- Rootscape Pond Aerator Air Diffuser - Replaces Air Stones For Ponds - Pond Aerators For Large Ponds - Koi Pond Filtration Accessories - Pond Aerators For Outdoor Ponds - Pond Aerator Diffuser

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**Shop now:** [https://www.desertcart.com.ar/products/18523781-blue-diamond-et-120-septic-or-pond-linear-diaphragm-air](https://www.desertcart.com.ar/products/18523781-blue-diamond-et-120-septic-or-pond-linear-diaphragm-air)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-16*