AI Axis 20 Centrifugal Pump

The AI Axis 20 Centrifugal Pump is the smallest in AquaIllumination's Axis return pump line, built for tanks 15 gallons or less. Despite its compact size, it brings features usually reserved for larger, pricier pumps — wireless smart control, a quiet DC motor, and anti-siphon calibration.

• Flow rate: ~185 GPH (700 lph)
• Max head: ~5ft (1.5m)
• Power: variable, 12W max, 100-240VAC input
• Dimensions: 2.125in diameter x 5.5in tall
• Nozzle sizes (barbed): 0.5in (12mm) small, 0.625in (16mm) large — interchangeable for different plumbing setups
• Coordinated modes: a single button on any connected AI pump can switch all your AI pumps into feed or maintenance mode together
• Anti-siphon calibration: instead of shutting off completely, the pump keeps spinning without producing flow — this prevents back-siphoning and avoids air bubbles when it resumes normal operation

The anti-siphon calibration is a genuinely useful detail for a return pump specifically — a pump that fully stops can let water siphon backward through the plumbing, and this design avoids that failure mode entirely.

Compatible replacement parts: barbed nozzle sets for the Axis 20.

At Marine Concept Supply, all sales are final. Due to the sensitive nature of live animals and aquatic products, we do not accept returns or exchanges under any circumstances. Please review your order carefully before completing your purchase. No Cancellations.

If you have any questions or concerns about your order, please contact us at shop@marineconceptsupply.com and we’ll do our best to assist you.

We Ship UPS and will send tracking as soon as the item ships. 

Return shipping for any approved warranties are not covered and will be subtracted from the approved credit total.

Restock Fees apply to some products, due to their size or a manufacturer policy.Each product with a restock charge is marked online, in the description.

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right