Fountain Cube C Setup: Step-by-Step Guide
By PETKIT UK | Published: 2026-10-18
Category: How-to Guides
Learn how to set up your PETKIT Fountain Cube C filter in under 3 seconds. Follow these steps for a clean, fresh cat water fountain.
Quick answer
Replace the old filter in your Eversweet Ultra with the Fountain Cube C in three seconds—no tools required. Just align, push, and twist to lock.
Why the Fountain Cube C filter matters
The Fountain Cube C is designed specifically for the PETKIT Eversweet Ultra Cat Water Fountain. Its high-density carbon improves water taste, and a slime-resistant layer reduces buildup by 30% compared to standard filters. The tool-free design means you can swap it in seconds, and the PETKIT App tracks when it's time for a replacement—typically every 30 days.
Fountain Cube C setup steps
- 1. Remove the old filter: Turn off and unplug the fountain. Lift the top cover and remove the used filter. Dispose of it properly. Common mistake: Forgetting to rinse the fountain basin before inserting a new filter. If the basin is slimy, clean it first.
- 2. Rinse the new Fountain Cube C: Hold the new Cube C under cool running water for about 10 seconds. This activates the carbon and removes any loose dust. Do not use soap or detergent—it can leave residue that affects water taste.
- 3. Insert and lock the filter: Align the Cube C with the filter slot in the fountain base. Push it in until it clicks, then twist gently to lock it into place. No tools needed. If it doesn't click, check that the filter is oriented correctly—the arrow on the Cube C should point upward.
- 4. Reassemble and fill the fountain: Place the top cover back on, fill the reservoir with fresh water, and plug the fountain back in. The pump should start within a few seconds. Wait 2-3 minutes before letting your cat drink to allow the carbon to fully saturate.
- 5. Track replacement in the PETKIT App: Open the PETKIT App and confirm the new filter installation. The app will track usage and remind you to replace the Cube C after 30 days. Set a reminder in the app to avoid running the filter past its effective lifespan.
Product facts
- Fountain Cube C: High-density carbon enhances water taste, while a slime-resistant layer reduces buildup by 30%. Your cat gets fresher, cleaner water with less frequent cleaning of the fountain basin.

Fountain Cube C
