PETKIT PuraMax 2 Review: A Multi-Cat Self-Cleaning Litter Box
Our PETKIT PuraMax 2 review covers the low entrance, per-cat app tracking, odor control, cat size limits, and who should choose another box.
By Dave Curtis
Updated October 15, 2026
The PETKIT PuraMax 2 is an enclosed, drum-style self-cleaning litter box built for homes with more than one cat. It cleans after each visit, seals waste in a drawer with an odor cartridge, and its app tells cats apart by weight, so you can see each cat’s visits, time in the box, and weight over time.
Our verdict: the PuraMax 2 is a strong pick for multi-cat homes, older cats that need a low step, and owners who want odor kept inside a closed unit. Skip it if you have a kitten under 6 months, a cat over 22 lb, or only carpet to put it on. This is a research-based review drawn from PETKIT’s published specifications and Amazon owner ratings, not a home trial.
This guide is general product information, not veterinary advice. If your cat’s litter box habits change, such as straining, going outside the box, or producing much more or less urine than usual, contact your veterinarian.
Prime PETKIT PuraMax 2 Self-Cleaning Litter Box
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At a Glance
| Design | Enclosed drum, cleans after each use |
| Cat size (listed) | 3.3 to 22 lb; not for cats under 6 months |
| Entrance height | 7.87 inches |
| Interior | 76 L |
| Waste bin | 7 L, up to 15 days per PETKIT |
| Sensors | 7 infrared and 4 weight sensors |
| Dimensions and weight | 24.21 x 21.96 x 21.96 inches, 22 pounds (listed) |
| App | PETKIT app, 2.4GHz Wi-Fi, identifies cats by weight |
What We Like
- Per-cat records. The app identifies each cat by weight and logs weight, visit frequency, and time in the box, which is useful in a home with two or three cats.
- Low step in. A 7.87-inch entrance is easier for senior cats, short-legged cats, and cats with limited mobility than a tall drum.
- Closed odor system. A sealed waste bin works with the included N50 2.0 odor remover, and PETKIT’s ShieldBase seals the drum base to limit leaks.
- Layered safety design. Seven infrared sensors and four weight sensors pause cleaning when a cat approaches, and the entrance stays open so a cat cannot be shut inside.
- Uses regular clumping litter. PETKIT says it works with most clumping litters, so you are not tied to a proprietary refill.
What Could Be Better
- Size limits. PETKIT lists it for cats from 3.3 to 22 lb and says not to use it for pets under 6 months.
- Floor placement. PETKIT says not to put it on carpet or mats, which can interfere with the sensors.
- Footprint. At a listed 24.21 by 21.96 inches, it needs a dedicated corner.
- Wi-Fi limits. The app works on 2.4GHz Wi-Fi only.
- Accessory note. PETKIT says this version does not work with its K3 Smart Spray.
Cat Size, Kittens, and Safety
The 3.3 to 22 lb range covers most adult cats, but a large Maine Coon may be near or past the limit, so weigh your cat first. For kittens, PETKIT’s rule is simple: no pets under 6 months. Until then, use a regular pan and move to the PuraMax 2 later.
Safety comes from sensors plus design: the infrared and weight sensors pause the drum when a cat comes near, and the always-open entrance prevents a cat from being closed in. Watch the first few days of use, and keep the unit on a flat, hard floor so the weight sensors read correctly.
Odor, Waste Bin, and Running Costs
The 7 L waste bin is sealed, and PETKIT says it can go up to 15 days between emptying, though more cats means sooner. The bundle includes the N50 2.0 odor remover, 20 waste bags, a litter sifter, and a magnetic litter remover. Ongoing costs are clumping litter, waste bags, and replacement odor cartridges, so check PETKIT’s bag and N50 refills before you buy.
Using the App to Track Each Cat
Beyond remote control and cleaning modes (auto, manual, timer, and empty), the app’s main value is per-cat data. A steady record of each cat’s weight and visits makes changes easier to notice. A sudden rise or drop in visits, straining, or blood in the urine are reasons to call your veterinarian the same day.
How It Compares
The Neakasa M1 Plus is the open-top alternative. Neakasa rates it for cats up to 33 lb and three cats, and it seals odor with a brush strip instead of a cartridge, but an open top lets more litter scatter. See our Neakasa M1 review.
The PetSafe ScoopFree avoids clumping litter altogether with disposable crystal trays and no app, which is simpler but ties you to its trays. See our PetSafe ScoopFree review, or compare all three in our best self-cleaning litter boxes guide.
Who Should Look Elsewhere
Look elsewhere if your cat is over 22 lb or younger than 6 months, if the only spot you have is carpeted, or if your Wi-Fi is 5GHz only. If your cat avoids enclosed boxes, an open-top model is the safer bet. For manual options, browse our litter box coverage.
Why You Should Trust Us
We do not conduct our own product trials; our picks draw on published specifications, independent reviews, and Amazon owner ratings, which also set each product’s ICL Score. We may earn a commission from qualifying purchases, but that never affects our verdicts or scores. Read the full method in How We Review.
Final Verdict
The PETKIT PuraMax 2 suits a home with two or three adult cats that want an enclosed box with a low step, and owners who value per-cat tracking. The trade-offs are firm limits on cat age and weight, a large footprint, and the need for a hard floor and 2.4GHz Wi-Fi. If those fit your home, it is one of the more complete enclosed options on Amazon.
Frequently Asked Questions
What is the difference between the PETKIT Pura Max and PuraMax 2?
This review covers the PuraMax 2. PETKIT lists upgrades such as the ShieldBase seal and the N50 2.0 odor remover; compare current listings if you are looking at an older Pura Max.
Can kittens use the PETKIT PuraMax 2?
No. PETKIT says not to use it for pets under 6 months or under 3.3 lb.
What litter works in the PETKIT PuraMax 2?
Clumping litter. PETKIT says it is compatible with most clumping litters.
How many cats can use the PETKIT auto litter box?
PETKIT markets it for multi-cat homes and the app tells cats apart by weight. More cats fill the 7 L bin faster, so plan to empty it more often.
Can the PuraMax 2 go on carpet?
PETKIT says no. Carpet and mats can interfere with the sensors, so place it on a flat, hard floor.
About the author
Dave Curtis covers litter boxes for IndoorCatLab, including self-cleaning models, standard boxes, enclosures, and accessories. Each guide compares manufacturer specifications, owner ratings, and published independent reviews to show which box suits which home.