Cat water fountains · Choose by your needs
If accessible water must remain when the pump stops, Catit LED Flower #43747 retains water in six shallow petal cups, while PetSafe Oasys 128 oz has an open bowl that holds water when power stops. That is passive water at the drinking surface—not powered backup, a quantified reserve or a guarantee of how long the water stays available.
Comparison updated 29 October 2026.
| Model | Exact design | Water available when pump stops | Limit |
|---|---|---|---|
| Catit LED Flower Fountain 43747 | Catit LED Flower #43747 | Six shallow petal cups retain surface water | 3 L tank; cups do not expose the full reservoir when flow stops. |
| PetSafe Oasys 128 oz PWW00-16777 128 oz | PetSafe Oasys 128 oz PWW00-16777 | Open plastic bowl retains water when electricity stops | 128 oz nominal bowl; outlet pump still needs regular cleaning. |
| PetSafe HydroSphere Cordless 60 oz PWW00-18313 Black / PWW00-18311 White | PetSafe HydroSphere Cordless PWW00-18313/18311 | Acclimation instructions support drinking while powered off | 1.7 L described capacity; low-water automatic shutdown not established. |
Choose it when: The exact #43747 product page and guide identify six petal cups that retain drinking water when the pump stops.
The limit: The cups hold a smaller amount at the surface; they do not make the fountain cordless or expose the entire reservoir. The model is outlet-powered and its automatic low-water shutdown is unconfirmed.
Choose it when: The exact Oasys facts describe an open bowl that physically holds accessible water if the pump stops, meeting the retained-surface need.
The limit: The retained bowl is not a rechargeable backup or a measured outage allowance. The exact guide requires maintaining water above the pump minimum and regular inspection.
Choose it when: The exact HydroSphere Cordless acclimation instructions suggest leaving the fountain powered off until a hesitant pet drinks, establishing accessible water without the pump running.
The limit: This documents accessible water, not a specified reserve quantity or duration. Its battery mode is motion-triggered; low-water automatic shutdown is not confirmed for this Cordless variant.
A retained pool can remain physically accessible without the pump running. It does not power circulation during an outage. If the fountain must keep moving water away from an outlet, choose a battery plan and a flow mode documented for that battery setup.
The sources establish a surface or open bowl, not a number of hours, a refill interval, or a safe period to leave an animal. Check water routinely and follow model-specific cleaning guidance.
No. Catit LED Flower's petal cups retain a smaller amount at the surface; they do not expose its full tank when the pump stops.
Its open bowl physically holds water if pumping stops. The evidence does not establish a battery backup or a specified outage reserve, and the pump needs regular water checks.
The exact model's acclimation instructions suggest a powered-off introduction. That is a use instruction, not a quantified amount or duration of retained water.
