The Aqua One Replacement Diaphragm is a spare part for the Aqua One Stellar 110 / S-20 air pump. The diaphragm is the rubber part inside the pump that moves to produce air. Over time it can wear, harden or split, which reduces airflow or makes the pump noisy.

Fitting a new diaphragm is a simple, low-cost way to help restore airflow and extend the life of your pump, instead of replacing the whole unit.

Key Features

• Made for the Stellar 110 / S-20: Sized to suit this Aqua One air pump model.
• Helps restore airflow: Replaces a worn, hardened or split diaphragm.
• Quieter running: A fresh diaphragm can reduce rattling caused by wear.
• Easy to fit: Swaps in with basic tools.
• Aqua One spare part: Made for Aqua One Stellar air pumps.

Suitable For: Aqua One Stellar 110 / S-20 air pumps.

Product Specifications

How to Use

1. Unplug the air pump at the power point and disconnect the airline.
2. Remove the screws from the base of the pump and open the casing.
3. Lift out the old diaphragm, noting how it’s seated.
4. Fit the new diaphragm in the same position and check it sits flat.
5. Reassemble the pump, reconnect the airline and test the airflow.