The Roborock S9 MaxV Ultra is part of the S9 MaxV series, combining multi-directional obstacle avoidance with an Ultra dock that handles auto-emptying and mop maintenance automatically. At the close of each cleaning session the dock draws debris from the robot’s bin and deposits it into a sealed collection bag, so the bin is cleared and ready for the next cycle. As the bag fills the extraction path narrows, which reduces how effectively the dock empties the bin after each run. Monthly bag changes keep that path clear and the extraction working as the system intends.
This bundle of 18 Plus.Parts® compatible bags provides a direct-fit option for the Roborock S9 MaxV Ultra auto-empty dock. Eighteen bags in one purchase covers monthly replacements for well over a year, and each bag seals at the moment of extraction to keep fine particles and allergens securely contained from removal through to disposal. Bags are dimensioned to the dock housing and seat in the same position as the originals.
Our team is available to answer compatibility questions or anything else about your order.
Quick overview
- Dock-Specific Sizing – Each bag is built to the Roborock S9 MaxV Ultra dock housing dimensions, seating in the original position with no modifications required.
- Long-Term Coverage – Eighteen bags in one bundle covers monthly replacements for well over a year, reducing reorder frequency for a regularly needed part.
- Available Support – A real team is ready to assist with compatibility checks, delivery questions, or anything else about your purchase.






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