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Charles Austen ET150A Air Blower with Built in Alarm 150 l/pm

£344.00

(exc VAT)
£344.00

(exc VAT)
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The Charles Austen ET150A Linear Diaphragm Air Pump is a reliable, high-performance aeration solution designed for sewage treatment plants, septic tank systems, and pond aeration applications. Delivering a clean, oil-free air supply of 150 litres per minute at 0.20 Bar, this durable air pump helps maintain optimal biological treatment processes and healthy oxygen levels.

Designed for long-term outdoor use, the ET150A features a robust weatherproof housing that protects against the elements, making it suitable for both indoor and outdoor installations. For added peace of mind, the pump is equipped with an integrated low-pressure alarm system that alerts users via a bright LED indicator and audible buzzer if airline pressure drops below optimum levels.

Combining dependable performance, low maintenance requirements, and easy installation, the ET150A is an ideal replacement or upgrade for wastewater treatment and pond aeration systems.


Key Features

  • Delivers 150 LPM airflow at 0.20 Bar
  • Provides a clean and oil-free air supply
  • Built-in low-pressure alarm for enhanced system protection
  • Bright LED warning light and high-pitched audible alarm
  • Optional 230V output wire for external alarm panels or beacons
  • Weatherproof construction for indoor and outdoor installations
  • Includes rubber elbow connector for quick and easy fitting
  • Ideal for sewage treatment plants, septic tanks, and pond aeration
  • Compatible with service kits for extended pump lifespan and reliable operation


Ideal Applications

  • Septic tank aeration systems
  • Sewage treatment plants
  • Domestic and commercial wastewater treatment systems
  • Pond and koi pond aeration
  • Aquaculture and fish farming
  • Environmental treatment systems


Technical Specifications

  • Model: ET150A
  • Performance: 150 LPM @ 0.20 Bar
  • Power Consumption: 125W
  • Connector Size: 18 mm
  • Length: 346 mm
  • Width: 200 mm
  • Height: 222 mm
  • Weight: 9.0 kg

 

Why Choose the Charles Austen ET150A?

The ET Enviro 150A combines powerful airflow, energy-efficient operation, and advanced alarm monitoring in a weatherproof design. Whether you're maintaining a wastewater treatment system or improving oxygenation in a pond, this trusted Charles Austen air pump delivers dependable performance and long-term reliability.


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: BLOBLOWCHA024

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

Got questions? We’ve got the answer...

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.