Each pump comes on a fitted UK plug, with the rubber elbow and hose clamps needed to connect it.
Applications include garden ponds and water features, freshwater and marine aquariums, hydroponic and aquaponic nutrient aeration including RDWC, compost tea brewing, and septic, wastewater and water treatment aeration.
| Model | Air output | Max. tank depth |
|---|---|---|
| ET40A | 40 L/min | 1.2 m |
| ET60A | 60 L/min | 1.5 m |
| ET80A | 80 L/min | 1.75 m |
| ET100A | 100 L/min | 1.9 m |
| ET120A | 120 L/min | 2.0 m |
| ET150A | 150 L/min | — |
| ET200A | 200 L/min | — |
- Built-in low-pressure alarm — a buzzer and a red LED beacon on the unit
- Silence it without stopping it — a TEST / MUTE / RUN switch lets you prove the alarm works and mute it while the pump keeps running.
- Serviceable — the filter element washes out and the diaphragm is user-replaceable, so a tired pump can be reconditioned rather than binned. Service kits available separately.
- Thermal cutout — shuts the pump down if it overheats and restarts it automatically once cool.
- Weatherproof build — for outdoor siting in a sheltered position.
- CE marked and UL certified, with a 2-year manufacturer warranty against manufacturing defects.
What sets the alarm off?
Loss of pressure in the airline. A split or disconnected pipe, a worn diaphragm or a stopped pump will all do it. The sensor switches at around 0.04 bar, against a normal running pressure of 0.10 to 0.15 bar. It signals both ways, an audible buzzer and a red LED beacon on the unit, so a fault is obvious across a dark plant room as well as audible.
Can I silence the alarm without stopping the pump?
Yes. The switch has three positions, TEST, MUTE and RUN. Set it to RUN once installed. TEST proves the buzzer sounds, MUTE silences it while the pump carries on running.
How noisy is it?
Quiet for the output, but not silent. Like every diaphragm pump it produces a continuous hum, 40 to 45 dB.
Can I use it outdoors?
Yes, in a sheltered position under cover. Charles Austen describe the ETA series as weatherproof but publish no IP rating, so treat it as protected from the weather rather than sealed against it. Outdoor electrical work should be done by a qualified electrician.
Is it serviceable?
Yes, the filter element washes out and the diaphragm is user-replaceable with service kits available. Clean the filter at least every six months, more often somewhere dusty. The manufacturer recommends a service at least every 18 months.
Why is my air output lower than the table says?
The quoted output is measured at the pump’s rated pressure. Anything that adds back pressure reduces it — deeper diffusers, longer or narrower airline, sharp bends, and air stones that have silted up. Larger bore pipe, gentle bends and clean stones all help. It is worth getting right: excessive back pressure is the commonest cause of premature diaphragm failure, and running with the outlet closed off will overheat the pump.
Do I need a non-return valve?
Only if the pump sits at or below water level, but it is always a good idea. Site it above the water line where you can. If you cannot, fit a non-return valve in the outlet pipe, or water will siphon back into the pump when it is switched off.
What else do I need to buy?
Airline and air stones, which are not included. We stock both, along with non-return valves and manifolds if you are splitting the air between several stones.
| Model | Rated at | Power | Noise |
|---|---|---|---|
| ET40A | 0.12 bar | 30 W | 40 dB |
| ET60A | 0.12 bar | 45 W (55 W) | 40 dB |
| ET80A | 0.10 bar | 60 W (85 W) | 40 dB |
| ET100A | 0.10 bar | 80 W (105 W) | 45 dB |
| ET120A | 0.20 bar | 90 W (125 W) | 45 dB |
| ET150A | 0.20 bar | (130 W) | — |
| ET200A | 0.20 bar | (195 W) | — |
| Model | Thread | Brass barb | Over nozzle | Rubber elbow |
|---|---|---|---|---|
| ET40A | 10 mm | 10 mm ID | 15 mm ID | 19 mm OD |
| ET60A | 10 mm | 12 mm ID | 15 mm ID | 19 mm OD |
| ET80A | 10 mm | 12 mm ID | 15 mm ID | 19 mm OD |
| ET100A | 10 mm | 12 mm ID | 15 mm ID | 19 mm OD |
| ET120A | 10 mm | 12 mm ID | 15 mm ID | 19 mm OD |
| ET150A | — | — | 15 mm ID | 19 mm OD |
| ET200A | — | — | 15 mm ID | 19 mm OD |
| Type | Linear diaphragm air pump |
| Electrical | 220–240 V, 50 Hz, fitted UK plug, 1.4 m cable (approx.) |
| Duty cycle | Continuous |
| Alarm indication | Audible buzzer and red LED beacon |
| Alarm switch | TEST / MUTE / RUN |
| Alarm trigger | Approx. 0.04 bar |
| Thermal cutout | Automatic, self-restarting on cooling |
| Storage temperature | Not below −8 °C |
| Weatherproofing | Weatherproof, no IP rating published |
| Certification | CE marked, UL certified |
| Warranty | 2 years against manufacturing defects |
| 1 × ETA air pump | Model as selected, fitted UK plug, 1.4 m cable (approx.) |
| 1 × brass barbed connector | Sized to the model, see Connections |
| 1 × rubber elbow | 15 mm ID over the nozzle, 19 mm OD |
| 2 × hose clamps | For securing the elbow and airline |
| Not included: airline, air stones and diffusers, non-return valves and manifolds, all available separately in our shop. | |
All stock is here in Dorset UK ready to go!
Your order will be carefully packed and dispatched within 24 hours of receiving payment (Monday to Friday). We try to dispatch quickly, so please let us know straight away if there is any extra information we need.
For next-day shipping orders, please allow one working day for dispatch, and be aware that next-day services typically operate on weekdays only.
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To arrange a return, please open a case and follow the simple returns process to generate a shipping label, track progress, and manage your refund. Do get in touch if you have any questions about your order or the returns process.
We really want you to be happy with your purchase and will promptly put right any mistakes or faulty goods.
Please be aware that unwanted items must be returned in their original, unused condition, since we only sell new goods and cannot re-list returned items in anything other than new condition. Return postage is the buyer's responsibility.
We take product quality and safety seriously, and all our products meet applicable UK standards. Further compliance information is available on request.
Please always read the product instructions before use and follow all safety guidance. This is particularly important for electrical products, or any product used in or near water.
Our listings may describe uses and applications drawn from manufacturer guidance or common product use. These descriptions are provided for general information only. It is the responsibility of the buyer and end user to assess suitability for any specific application and to seek professional or specialist advice where appropriate. We make no warranty that any product is suitable for a particular purpose.
When you buy from us you are supporting a small family business based in Dorset UK and you can be sure that your order will be treated with heartfelt appreciation and gratitude.
We are eBay specialists in hydroponics, aquatics, irrigation and garden products, with a focus on quality, reliability and competitive prices. The Gardeners Wild brand has been trading on eBay since 2011.
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