How often to change a PETKIT filter
PETKIT suggests a new filter every 2 to 4 weeks for the EverSweet fountains, and about once a month in Normal mode. The answers below cover which models use the Filter Unit 3.0, our packs and our fit refund.
How often should I change a PETKIT fountain filter?
PETKIT suggests a new filter every 2 to 4 weeks. PETKIT support says about once a month in Normal mode, and some retailer listings say 60 days in Smart mode. At 2 to 4 weeks, a 12-pack covers 24 to 48 weeks.
Which EverSweet models use the Filter Unit 3.0?
The EverSweet 2S, 3, 3 Pro, Solo, Solo 2 and Solo SE use the PETKIT Filter Unit 3.0. Fountainleaf filters are made to that size.
Does the EverSweet Max use the same filter?
No. The EverSweet Max uses a rectangular (RECT) filter. Fountainleaf filters do not fit it.
What does P4161 mean?
P4161 is the part number of the PETKIT Filter Unit 3.0. It is a round disc about 140 mm (5.5 in) across and 12 mm (0.47 in) thick, with a center hole.
Will a Fountainleaf filter fit my fountain?
We make it to the Filter Unit 3.0 size: the same diameter, thickness and center hole. We check fit samples in each listed model before the first order. If a filter does not fit your listed model, we refund the pack.
What is the filter made of?
The planned media is activated carbon, ion-exchange resin and PP cotton, in a white plastic frame. We publish the final materials when the supplier samples pass our checks.
How much do the packs cost?
A 12-pack is $19.99 ($1.67 a filter). A 24-pack with a cleaning brush is $29.99 ($1.25 a filter). PETKIT sells its Filter Unit 3.0 at $19.99 for five (petkit.com, November 8, 2026).
When do packs ship?
Packs are not shipping yet, and we have no ship date. This is a reservation. We do not charge you now. We email you when packs ship, and you choose then.
How do I reserve a pack?
Use a Reserve button on the home page. It opens an email to lalit@fountainleaf.com with the pack in the subject line. Add your fountain model and send it.
Can I cancel a reservation?
Yes. Reply to our email or write to us, and we remove your name. We have not charged you, so there is nothing to refund.
What if a filter does not fit?
Email us your fountain model within 30 days of delivery. We refund the pack in full, and you do not need to send it back. Read the shipping and refund terms.
How do I reset the filter light on an EverSweet?
PETKIT explains the reset for each model on its support page. Follow the steps for your model after you put in a new filter.
Is Fountainleaf part of PETKIT?
No. Fountainleaf is a brand of Delty, Inc. in San Francisco. PETKIT and EverSweet are trademarks of their owner, and we use the names only to say which fountains our filters fit.
Where do you ship?
We plan to ship to addresses in the United States.