A Simpler Cat Fountain? Oneisall Filterless Fountain Review
- Tips Trove
- May 1
- 3 min read
Keeping your cats hydrated shouldn’t mean dealing with constant cleaning or replacing filters every few weeks. After using a traditional cat fountain for a while, I wanted to try something simpler—so I picked up the Oneisall filterless cat water fountain.
In this post, I’ll break down how it works, what makes it different, and whether it’s actually worth switching.
Why I Switched From a Traditional Fountain
Most cat fountains follow the same formula: recirculating water through a filter. While that works, it comes with a few downsides:
Filters need to be replaced regularly
Tight internal spaces can collect buildup over time
Cleaning can take longer than expected
“Smart” features and apps aren’t always reliable
After dealing with those issues, I wanted something more low-maintenance.
What Makes This Fountain Different
The biggest difference here is simple:
There’s no filter.
Instead of continuously cycling the same water, this fountain separates clean water and dirty water into two compartments.
Clean water is stored in a dedicated tank
Water is dispensed into a drinking tray
Used water drains into a separate dirty tank
The tray refills with fresh water on a schedule
This means your cat is always drinking fresh water—without needing a filter.
Key Specifications
Here are the main details you’ll want to know:
Type: Filterless, dual-tank water system
Material: Stainless steel drinking tray + plastic reservoirs
Water Capacity: 3.5L Large clean water tank (suitable for multi-cat households)
Power Options: Plug-in or built-in rechargeable battery
Scheduling: Up to 6 automatic water refresh cycles per day
Noise Level: Quiet operation
App Connectivity: None (fully manual controls)
Cleaning: Removable tray + separate dirty water tank
Setup & Daily Use
Setup is straightforward and only takes a few minutes:
Fill the clean water tank
Assemble the three main components
Choose your refresh schedule
From there, the fountain handles the rest. Water is refreshed automatically based on your settings.
One thing to note—this fountain does not have motion detection. It runs entirely on a schedule, so you may need to adjust timing based on your cats’ habits.
Cleaning & Maintenance
This is where the fountain really stands out.
Since there’s no filter and no recirculating system:
The clean water tank stays relatively clean (especially if using filtered water)
The stainless steel tray is the main part that needs regular cleaning
The dirty water tank can be quickly rinsed out
Overall, cleaning is much faster and more straightforward compared to traditional fountains.
Pros & Cons
Pros
No recurring filter costs
Simple, easy-to-understand design
Much easier to clean
Large water capacity
Flexible placement with battery option
Cons
No motion sensor
No app or smart tracking features
Requires dialing in the right schedule
Final Thoughts
If you’re tired of dealing with filters and want something that’s easier to maintain, this fountain is a solid option. It focuses on simplicity—and in this case, that’s actually a big advantage.
It’s especially well-suited for:
Busy pet owners
Multi-cat households
Anyone looking to reduce maintenance and recurring costs
If you don’t need smart features and just want something that works reliably, this is definitely worth considering.
Watch the Full Video Review
For a full walkthrough, setup demo, and real-world testing, check out my video below:
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