What is the dirty water tank capacity of the H11? August 25, 2022 08:57 Updated The capacity of the dirty water tank is 500ml. Related articles How many suction level modes does the H11 have? During regular use, it's possible for the floor scrubber's assistive wheels, which make contact with the floor, to leave behind a slight amount of water residue. To reduce the occurrence of water stains, you might try the following tips How to use the Spot Clean function with the robot ? What is the clean water tank capacity of the H11? How to solve the problem of unable to connect to Wi-Fi ?