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Quick answer: PETKIT lists Filter Unit 3.0, model P4161, for EverSweet 3 Pro, EverSweet 3 Pro (UVC), EverSweet Solo 2 and EverSweet Solo SE. The manufacturer’s list does not include EverSweet Ultra or Max 2 UVC. Treat those as unconfirmed for P4161, and match the filter to the exact fountain model and part description before ordering. (PETKIT P4161 product page)
This is a source-based compatibility lookup, not a hands-on fit test. For general product context, see our water fountain guide and filters and parts guide.
Contents
- What P4161 fits
- Model differences that matter
- Size, pack and replacement timing
- A before-order check
- Frequently asked questions
What P4161 fits
PETKIT’s product specification names P4161 as Filter Unit 3.0 and gives this application scope:
| Fountain model listed by PETKIT | P4161 status |
|---|---|
| EverSweet 3 Pro | Listed |
| EverSweet 3 Pro (UVC) | Listed |
| EverSweet Solo 2 | Listed |
| EverSweet Solo SE | Listed |
| EverSweet Ultra | Not listed on the P4161 page; compatibility unconfirmed |
| EverSweet Max 2 / Max 2 UVC | Not listed on the P4161 page; compatibility unconfirmed |
The first four entries are the product page’s named models. The separate PETKIT manuals index also names Ultra and Max 2 variants, showing they are distinct model families. A model appearing in a manual library does not establish that it uses P4161.
Model differences that matter
Do not choose a fountain filter by brand alone or by a similar-looking disc. The Max 2 UVC product page describes an included rectangular filter for that fountain; it does not identify that part as P4161. PETKIT’s P4161 page separately limits its listed scope to the four models in the table. (Max 2 UVC product page, P4161 page)
That distinction matters if your fountain is labelled EverSweet Max 2 UVC. The “UVC” suffix does not establish interchangeability with the 3 Pro UVC filter. The Max 2 UVC page’s rectangular-filter description is a shape cue, not a complete compatibility specification.
An independent compatibility guide also lists P4161 for the 3 Pro, 3 Pro UVC, Solo 2 and Solo SE. That secondary source does not add Max 2 or Ultra, so use PETKIT’s model list for a product-specific fit decision. (The Housecat Standard)
Size, pack and replacement timing
PETKIT lists P4161 at 140 × 140 × 12 mm, as a five-piece pack, and gives a recommended replacement interval of 2–4 weeks. That interval is manufacturer guidance, not a guarantee that every household’s filter will last the same amount of time. Use the fountain’s maintenance instructions and inspect the filter during routine cleaning.
Dimensions can help you compare a package label, but they do not override the model-specific application list. A part that appears close in size may differ in fit, layers or intended fountain. See our filters and parts page for broader maintenance context.
A before-order check
- Read the model name from the fountain label, manual or original order record. Preserve the whole name, including generation and UVC suffix.
- Compare that exact model with PETKIT’s P4161 application list. Do not substitute a related family name.
- Check the replacement package for P4161 / Filter Unit 3.0 and confirm its listed model scope. If the package says a different part name or shape, verify with the fountain’s own product page or manual.
- If your model is Max 2 UVC or Ultra, do not infer P4161 compatibility from the brand or another PETKIT fountain. Ask the seller or manufacturer to identify the exact replacement part for your model.
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Frequently asked questions
Does P4161 fit PETKIT EverSweet Max 2 UVC?
PETKIT’s P4161 compatibility list does not name Max 2 UVC. The Max 2 UVC product page describes a rectangular filter but does not call it P4161. Treat P4161 fit as unconfirmed unless PETKIT identifies it for your exact model.
Is P4161 the same as the Max 2 UVC filter?
The official pages reviewed use different descriptions: P4161 is Filter Unit 3.0 and the Max 2 UVC page describes a rectangular filter. They do not establish that these parts are interchangeable.
How often does PETKIT recommend replacing P4161?
PETKIT gives a 2–4-week recommendation. That is manufacturer guidance; check your fountain instructions and the filter condition rather than treating the interval as a measured lifespan.
What if my fountain is not on the P4161 list?
Absence from the list means the reviewed manufacturer source does not confirm compatibility. It is not proof that a fit is physically impossible. Verify the exact replacement code with PETKIT or the seller before buying.
