PETKIT Purobot Ultra Cat Litter Box Trash Bag Refill Rings, 4-Pack, Leak-Proof

PETKIT Trash Bag Refill Rings are four replacement rings made exclusively for the Purobot Ultra self-cleaning, auto-packing cat litter box.

• PE trash bags — made to form an odor-free, leak-proof seal.
• About 10 waste-packing cycles per ring — provides repeated use before replacement.
• Waste bin capacity of up to 20 days for one cat — helps reduce how often waste needs attention.
• Patented auto-packing system — designed to seal waste even when the bin overflows.
• Visible bag warning marks and app notifications — help you know when the ring is running low.

These refill rings are for Purobot Ultra owners who want the litter box’s automatic packing system to collect used litter in a sealed bag. They support the routine of keeping waste contained between bin changes, with indicators to help you plan a refill rather than discover an empty bag unexpectedly. Actual packing frequency depends on your cat’s litter-box habits and how often waste needs packing.

How does the refill ring work with Purobot Ultra?

The ring works with the litter box’s patented auto-packing system to pack waste into the PE trash bag and form a seal. The system is designed to maintain that seal even if the waste bin overflows. The bags are made from polyethylene, selected for a balance of durability and sealing efficiency.

• Made for the Purobot Ultra auto-packing setup.
• Designed to contain odors and prevent leaks when sealed.

How long can one refill ring last?

One ring can pack waste approximately 10 times, while the bin can hold one cat’s waste for up to 20 days. These are usage estimates, not fixed replacement intervals: your cat’s habits and packing needs affect how frequently the system uses the bag.

• Use the bag’s visible warning marks to monitor remaining refill capacity.
• The litter box can also send an app notification when the bag is running out.

How do you replace the refill ring?

The integrated ring design is made for straightforward installation and replacement. The refill ring is non-removable within the auto-packing system, so use an original PETKIT refill ring to help prevent system malfunctions.

• This pack contains four refill rings.
• Replacement alerts are provided by the bag markings and the app.

PETKIT Trash Bag Refill Rings suit Purobot Ultra households that want waste packed automatically and contained in a bag between bin changes. They are intended specifically for the Purobot Ultra rather than other litter boxes, and each ring is designed for repeated packing within that system.

Read our guide: Cleaning and disinfecting kennels, hutches and cages