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On In-stock Spare Parts
Charles Austen ET100 Air Blower Diaphragm kit
Charles Austen ET100 Air Blower Diaphragm kit

Over 17,000+ Happy Customers

Charles Austen ET100 Air Blower Diaphragm kit

£17.50

(exc VAT)
£17.50

(exc VAT)
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VERY POPULAR! ONLY 20 LEFT IN STOCK

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Keep your Charles Austen ET100 Air Blower performing at its best with this genuine ET100 Diaphragm Replacement Kit. Specifically designed for ET100 linear diaphragm air pumps, this high-quality replacement diaphragm helps maintain efficient air compression, reliable airflow, and optimum system performance

Over time, diaphragms naturally wear due to continuous operation, which can lead to reduced airflow and decreased pump efficiency. Replacing worn diaphragms as part of your regular maintenance schedule helps restore performance, reduce strain on internal components, and extend the lifespan of your air blower.

Ideal for wastewater treatment plants, septic tank aeration systems, and other air-driven treatment applications, this replacement diaphragm is an essential service part for keeping your ET100 pump running reliably.

 

Key Features

  • Genuine replacement diaphragm for Charles Austen ET100 air blowers
  • Maintains efficient air compression and consistent airflow
  • Helps restore lost performance and improve blower efficiency
  • Reduces wear on internal pump components
  • Durable construction for long-lasting reliability
  • Quick and easy to replace during routine servicing
  • Suitable for septic tank and wastewater treatment air systems
  • Diaphragm Diameter: 80mm

 

Benefits of Replacing Your Diaphragm

  • Restores optimum airflow performance
  • Improves overall air pump efficiency
  • Helps prevent unexpected breakdowns
  • Extends the operating life of your air blower
  • Supports reliable wastewater and septic system aeration
  • Reduces strain on key pump components

 

Important Information

  • Magnets are NOT included in this diaphragm replacement kit.
  • If you require a complete maintenance kit including replacement magnets, please see the Charles Austen ET100 Service Kit.

 

Recommended Maintenance

For maximum reliability and performance, it is recommended that your Charles Austen ET100 Air Blower is serviced annually. Routine diaphragm replacement helps maintain efficient operation and reduces the risk of costly pump failures.


Suitable for:

  • Charles Austen ET100 Air Blower
  • Charles Austen ET100 Linear Diaphragm Air Pump

 

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.

SKU: BLODIAPCHA003

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Rated 4.8/5 by Direct Drainage Customers

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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.

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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.

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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.

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

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