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On In-stock Spare Parts
Charles Austen ET120A Air Blower with Built in Alarm 120 l/pm

Over 17,000+ Happy Customers

Charles Austen ET120A Air Blower with Built in Alarm 120 l/pm

£146.00

(exc VAT)
£146.00

(exc VAT)
Quantity
VERY POPULAR! ONLY 9 LEFT IN STOCK
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VERY POPULAR! ONLY 9 LEFT IN STOCK

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The Charles Austen ET120A Linear Diaphragm Air Pump is a dependable, high-quality aeration solution designed for sewage treatment plants, septic tank systems, and pond aeration applications.
Delivering a consistent 120 litres per minute airflow at 0.10 Bar, this linear diaphragm pump provides a clean, oil-free air source to support efficient biological treatment and healthy oxygen levels.Built with a durable rainproof, weatherproof housing, the ET120A is suitable for both indoor and outdoor installations.
It's integrated low-pressure alarm system helps protect your treatment system by monitoring airline performance and providing instant notification through a bright LED indicator and high-pitched warning buzzer if pressure drops.Designed for reliability, ease of installation, and long-term operation, the ET Enviro 120A is a trusted choice for maintaining effective aeration in domestic and commercial wastewater treatment systems.


Key Features

  • Delivers 120 LPM airflow at 0.10 Bar
  • Clean, oil-free air supply for efficient aeration
  • Built-in low-pressure alarm for added system protection
  • Bright LED warning light and audible buzzer alert
  • Optional 230V output wire for connection to alarm panels or beacons
  • Weatherproof and rainproof design for indoor or outdoor use
  • Includes rubber elbow fitting for easy installation
  • Ideal for sewage treatment plants, septic tank systems, and pond aeration
  • Compatible with service kits to maximise pump lifespan and performance


Ideal Applications

  • Domestic sewage treatment plants
  • Septic tank aeration systems
  • Wastewater treatment systems
  • Pond and koi pond aeration
  • Aquaculture applications
  • Commercial and residential treatment systems

 

Technical Specifications

  • Model: ET120A
  • Performance: 120 LPM @ 0.10 Bar
  • Power Consumption: 125W
  • Connector Size: 18 mm
  • Length: 315 mm
  • Width: 215 mm
  • Height: 228 mm
  • Weight: 9.5 kg


 

Why Choose the Charles Austen ET Enviro 120A?

Engineered for reliable continuous operation, the ET Enviro 120A delivers efficient, oil-free aeration with the added security of built-in pressure monitoring. Its weatherproof design, low-maintenance construction, and dependable airflow make it an excellent choice for septic tanks, sewage treatment systems, and pond oxygenation applications.

 

Warranty information

Charles Austen recommends that all air pumps and systems are serviced annually. Although the air pump carries a 2-year manufacturer's warranty, diaphragms, valves and filters are consumable parts that naturally wear over time and should be replaced during routine servicing to maintain warranty compliance and ensure reliable operation.

 

Product images are for illustration purposes only and may vary slightly from the actual product supplied.

 

 Data Sheet

 

SKU: BLOBLOWCHA023

Agricultural Tanks Agricultural Tanks Agricultural Tanks

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CUSTOMER REVIEWS

Rated 4.8/5 by Direct Drainage Customers

Based on over 600 verified reviews

VERIFIED REVIEW

Very helpful from the start to the finish

Items were despatched quickly and arrived the next day. Would recommend.

Title

North Hayne Farm Cottages | 26 June 2026

VERIFIED REVIEW

Cheapest price I could find for the pump

Cheapest price I could find for the pump and delivery the next day what more could you want.

Title

Sam Jukes | 5 November 2025

VERIFIED REVIEW

Great service!

I ordered a septic tank it was delivered within a week and the delivery driver left it in the exact right place and time. Would definitely use this company again, thanks so much.

Title

Eve Harland | December 2025

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FAQs

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When will my order be dispatched?

Spare Parts Shipping
We ship in-stock spare parts the same day if ordered before 3pm. These orders are sent with DPD as standard and will be shipped on a Tracked Next-Day service.


Tanks & Supplier-Shipped Items

Tanks and certain spare parts are shipped directly from our suppliers. We aim to submit supplier orders to the supplier on the same day your order is placed to ensure prompt processing. 

How much is delivery?

Delivery costs vary depending on the type of product:

 

In-stock Spare Parts: £8.20 - shipped via DPD on a Tracked Next-Day service.
Supplier-shipped Spare Parts: £15 - dispatched directly from the supplier.
Tanks and Sewage Treatment Systems: Free Delivery to most mainland UK postcodes.

 

All delivery charges are calculated accurately at checkout.

I need help with placing my order.

No problem! Here are a few ways we can assist you:

Live Chat: Click the chat icon on the bottom right of the page to speak with our team instantly.
Call Us: Reach us at 01388 537050 during business hours for quick support.
Email: Send your query to sales@direct-drainage.co.uk, and we’ll respond promptly.

Do you stock all tanks and sewage treatment systems?

We do not stock tanks and treatment systems as standard. These are supplied directly from the manufacturer. The lead times of these systems will vary. If you need an accurate delivery date, please contact us on 01388 537050.

Are your prices inclusive of VAT?

It is important to note that all prices listed on our website exclude VAT. VAT will be calculated at checkout. 

I've found the same item somewhere cheaper, can you match the price?

We always aim to offer competitive pricing. If you've found the same item cheaper elsewhere, let us know — we'll do everything we can to match or even beat the price.

 

Contact us directly on 01388 537050 or drop us an email at sales@direct-drainage.co.uk.