Your needs, this model
Does it fit your priorities?
Can I require outlet-powered continuous circulation, a lift-off reservoir without electronics and dishwasher permission for the drinking tray?
Yes. The motor and electronics stay in the dry base, while the non-base fountain parts have dishwasher permission after removing the filter. Normal circulation slows slightly in darkness.
Explore this need in the finder →Can it run as the main fountain on a rechargeable battery?
That arrangement is not documented. The exact guide connects the fountain by USB cable and wall adaptor to an outlet.
Explore this need in the finder →Does it meet a minimum nominal capacity of 2 liters?
No. Its 60 US fluid-ounce label converts to about 1.77 liters, below that minimum.
Explore this need in the finder →The PetSafe Outlast 60 oz is the smaller tray-style Outlast for someone who wants a circulating fountain without a submerged electrical pump to dismantle. The exact US model is PWW00-17957. A rotating cone lifts water through the tower while the motor stays in a dry base. The water bowl, cone, spout and clear drinking tray lift away for cleaning, which is the main practical reason to compare it with a conventional pump fountain.
A small reservoir still needs regular attention
The nominal capacity is 60 US fluid ounces, approximately 1.77 liters after unit conversion. That is a capacity comparison, not a measured usable volume or a promise of time between refills. Check the actual level regularly, especially after introducing the fountain or when more than one animal can reach it. Fill to the marked maximum rather than estimating by the visible bowl alone.
The 60 and 90 oz Outlast both use a clear tray over the bowl. The 128 oz model instead has an open-bowl drinking arrangement. Compare the drinking layout as well as the capacity. A cat accustomed to a shallow tray may approach it differently from a large open bowl, so let the animal get comfortable with the actual design.
Pumpless does not mean unpowered
The supplied USB cable and wall adaptor power the motor in the base. The setup guide places the fountain within six feet of an outlet. There is no documented rechargeable operating plan for this model, so choose its location around the electrical supply rather than assuming it can run in the middle of a room without a cord.
After assembly and connection, the cone rotates and water should begin flowing from the spout within 30 seconds. The motor slows slightly when the room is dark and speeds up in daylight. This is an ambient-light response, not a pet-approach sensor and not a user-set dispensing interval. It suits someone who wants ongoing circulation rather than water that starts only when a cat arrives.
The dry base changes the cleaning routine
Lift the bowl off the base before rinsing anything. The base contains the motor and electronics, is not waterproof and must not be rinsed or submerged. Removing the water assembly is therefore a necessary step, even though the rest of the fountain is designed for convenient washing.
The guide permits dishwasher cleaning of the non-base fountain parts after removing the filter; the product specifies the top rack. The cone and spout still need inspection and cleaning even though there is no submerged motor to open. Fully seat the bowl and cone when rebuilding, secure the tower lid and keep that lid in place during operation. This design reduces one familiar pump-cleaning job, rather than eliminating fountain maintenance.
The filter reminder measures elapsed time
The Ion-X filter uses activated carbon and ion-exchange media. Its blue reminder runs on a 21-day timer. After changing the filter, hold the status button for ten seconds to reset that timer. The light does not measure whether a filter has become dirty sooner, so inspect water and parts rather than waiting for blue flashing before paying attention.
PetSafe's guide says to clean every two to four weeks or as needed and recommends cleaning when replacing the filter. Adjust attention to the actual condition of the fountain. The status button sits on the base underneath the tower, so reaching it requires lifting the bowl. Remember that small handling step when choosing a location that will be easy to maintain.
Understand the warning light before buying app features you do not need
A steady red light indicates low water, and the motor stops if the fountain runs dry. Refilling to the maximum line restarts it. Removing the bowl also produces a red indication. A blinking red warning has a different troubleshooting sequence involving water level and properly seated parts. These are local device-status indications, not records of how much an individual cat drank.
Choose the Outlast 60 for its lift-off wet assembly, dishwasher-permitted parts and smaller nominal reservoir when outlet placement works. Compare the Catit PIXI Steel for an explicitly specified steel drinking tray, or the PETLIBRO Dockstream 2 for its documented battery and app arrangements. For more water within this same Outlast tray layout, the 90 oz version is the direct next comparison.
Key details at a glance
| Reservoir and capacity limits | 60 US fluid ounces nominal capacity, approximately 1.77 liters after unit conversion rounded down to two decimals. This is not a measured usable-water volume or a promise of days between checks. |
|---|---|
| Power arrangement | The supplied USB cable and wall adaptor power the separate dry base. The setup guide places the fountain within 6 feet of an outlet; no rechargeable operating plan is documented. |
| Water flow and conditions | Continuous normal circulation from a rotating cone, with slightly slower motor speed when the room is dark. This is not pet-approach sensing or a timed dispensing schedule. |
| Drinking surface and wet parts | A clear drinking tray fits over the bowl. The read US sources do not establish a drinking-surface material grade, so a steel or plastic hard requirement is not inferred from appearance. |
| Cleaning and source limitations | Remove the filter and lift the bowl off the base before washing. Non-base fountain parts have top-rack dishwasher permission. The electrical base is not waterproof and must not be rinsed or submerged. Clean every two to four weeks or as needed; the filter reminder is a 21-day timer. |
| App and observation limits | Local red/blue indications concern water level, a filter timer and motor condition. App intake records or individual-cat identification are not established. The normal blue status light is not assumed to be a drinking-area nightlight. |
Use the exact model’s instructions for operating limits, supplied equipment and version differences.
Sources for this assessment
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