---
product_id: 18523781
title: "Blue Diamond ET 120 Septic or Pond Linear Diaphragm Air Pump"
brand: "blue diamond pumps"
price: "3485 Lei"
currency: RON
in_stock: true
reviews_count: 8
url: https://www.desertcart.ro/products/18523781-blue-diamond-et-120-septic-or-pond-linear-diaphragm-air
store_origin: RO
region: Romania
---

# Energy-efficient 90W power 4.24 CFM max airflow Ultra-quiet 45 dB operation Blue Diamond ET 120 Septic or Pond Linear Diaphragm Air Pump

**Brand:** blue diamond pumps
**Price:** 3485 Lei
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your septic or pond system with silent, powerful airflow!

## 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?** 3485 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/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

- • **Whisper-Quiet Performance:** Operates at a subtle 45 decibels—perfect for maintaining peace without sacrificing power.
- • **Built to Brave the Elements:** Weatherproof, rugged design ensures reliable operation rain or shine, year-round.
- • **Peace of Mind with 2-Year Warranty:** Durable linear diaphragm material backed by a solid manufacturer guarantee.
- • **Boost Your Septic System's Efficiency:** Injects clean, oil-free oxygen to supercharge aerobic bacteria and accelerate waste breakdown.
- • **Effortless Installation & Maintenance:** Comes with a 1/2" bronze fitting and replaceable diaphragm kits for hassle-free upkeep.

## Overview

The Blue Diamond ET 120 is a weatherproof linear diaphragm air pump delivering up to 4.24 CFM airflow at 0.10 bar pressure, operating quietly at 45 dB with 90 watts power consumption. Designed for septic and pond aeration, it features easy installation with a 1/2" bronze fitting, replaceable diaphragms, and a 2-year warranty for lasting durability.

## Description

Blue Diamond PumpsBlue Diamond ET 120 Septic or Pond Linear Diaphragm Air Pump

## Features

- ✅ BOOSTS SEPTIC WASTE DECOMPOSITION: By adding clean, oil free oxygen to septic system wastewater, Blue Diamond's Enviro ET 120 air pump encourages aerobic bacteria to decompose organic matter. Its weatherproof and sturdy design makes it an excellent wastewater pump. It is also effective in a pond.
- ✅ OPERATES QUIETLY: This air pump produces little sound, 45 decibels. It uses 90 watts of electricity and has a maximum air flow of 4.24 cubic feet / 120 liters per minute. Its maximum pressure is 0.10 bar.
- ✅ EASY TO INSTALL AND SERVICE: Simple to put in place, this pump comes complete with a 1/2" ID bronze fitting. It is easily serviced with replaceable diaphragm kits (sold separately) for a long life.
- ✅ 2 YEAR MANUFACTURER WARRANTY - MADE TO LAST: In addition to being weatherproof, this durable pump features a specially formulated material for its linear diaphragm. Constructed to last, the pump has a 2 year warranty from its manufacturer.
- ✅ PERFECT SIZE: Measuring 10.43 inches long, the pump is 8.36 inches wide and 7.79 inches tall. It weighs 21 pounds. Its connector has a 0.71 inch outside diameter.

## Product Details

- **Brand:** Blue Diamond Pumps
- **Color:** Blue,bronze
- **Power Source:** Electricity
- **Item Weight:** 21 Pounds
- **Maximum Flow Rate:** 4.24 Cubic Feet Per Minute
- **Manufacturer:** Blue Diamond Pumps
- **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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Great for ponds
*by K***P on November 21, 2020*

We are using this to push two Rootscape Large Pond aerators. The unit was installed a couple months ago and has operated flawlessly. More than enough flow for the two aerators. There were some issues with the unit shutting down because of excessive heat but that was solved by building a permanent insulated home for the pump. No issues in hot or sub freezing temperatures since.

## 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.ro/products/18523781-blue-diamond-et-120-septic-or-pond-linear-diaphragm-air](https://www.desertcart.ro/products/18523781-blue-diamond-et-120-septic-or-pond-linear-diaphragm-air)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-01-23*