Proper operation of modern cleaning devices requires careful study of the instructions, especially when it comes to wet cleaning. Xiaomi Vacuum Mop P (often known as Dreame D9 or Mi Robot Vacuum-Mop P) is equipped with a combined tank that requires an accurate approach when filling. Errors at this stage can lead to failure of electronics or deterioration of cleaning quality, so it is important to clearly understand the design of the device.
The main issue that arises from the new owners is the access point for the liquid. Unlike the old models, where the tanks were removable and separate, it uses an integrated 2-in-1 system. This means that the dust collector and the water tank are combined into one module, but have different compartments. Water is poured strictly into the front section of the tank through a special valve closed with a silicone plug.
Before you start maintenance, you need to make sure that the device is turned off or in parking mode. The preparation process takes only a few minutes, but requires care. Next, we will take a detailed look at each step, the types of water used and the typical mistakes that users make when they first get acquainted with the gadget.
Design features of the combined tank
To successfully refuel, you need to understand the internal architecture of the module. The tank in the Xiaomi Vacuum Mop P is divided into two functional zones that may not be visually obvious when viewed briefly. The front (closer to the sensors and wheel) is designed for liquid, and the rear is designed for collecting dry debris. Between them is a sealed partition that prevents mixing of contents.
The top of the tank has two holes, covered with lids of different colors or shapes. The water valve is usually marked as a drop or is made in blue/transparent color, while the dust input is protected by a HEPA mesh filter. It is important not to confuse these inputs, since the filter design is not designed to contact moisture. The wet filter will instantly lose its properties and can become a source of unpleasant odor.
The water tank in this model is about 200 ml, which is enough to handle hard coatings of up to 60-80 square meters depending on the mode chosen. The fluid supply system operates by gravity or using a micro pump controlled by the robot's electronics, which ensures that the napkin is wetted uniformly without puddle formation.
Step-by-step: how to properly remove and open the tank
The process of removing the module is the first stage of maintenance. The robot must be in the charging station or be turned off. Turn the device bottom up or just open the top cover to access the insides. Carefully pull the handle or the ledge of the tank to remove it from the vacuum cleaner housing.
After removing the module, take a close look at the top panel, and you'll see two lids, and we're interested in the one that's closer to the robot's nose (front), which might have the words "Water" on it, or the symbol of the drop, unscrew or fold this lid, and underneath it you'll find a hole leading into the tank.
☑️ The tank refueling algorithm
It's important to follow the measure. There's a MAX marking inside the tank that indicates the maximum level of liquid, and it's unacceptable to go above that level, because when you put the tank back into the housing, the pressure created can squeeze the extra water through the valves directly onto the robot's electronic contacts, a critical point that often leads to short circuits.
⚠️ Warning: Never try to fill the water while the tank is inside the robot body, guaranteed to cause fluid to enter the motherboard and burn the device.
Water quality requirements and temperature regime
The quality of the liquid used directly affects the life of the humidification system. The manufacturer recommends using ordinary tap water, but with important caveats. If the water in your region is very hard, with high calcium and magnesium salts, over time this will lead to the formation of scale in the supply channels and on the pump.
The ideal option for Xiaomi Vacuum Mop P is filtered water (for example, after a household filter-jug) or bottled water of low mineralization. This will significantly prolong the life of the mechanisms. The use of distilled water is also permissible, but not strictly mandatory, if you regularly conduct preventive cleaning of the tank.
Temperature is also important: it is strictly forbidden to pour hot water (above 40 ° C), the plastic of the tank can deform from high temperature, which will disrupt the tightness of the connections, and hot steam inside the closed volume can damage the fluid level sensors.
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To prevent mold and unpleasant odor, do not leave water in the tank for longer than 2-3 days. After each wet cleaning, drain the remaining liquid.
When it comes to adding detergents, you have to be very careful. Conventional floor washing liquids create a plentiful foam that can penetrate the pump and disable it, and only specialized, low foam concentrates specifically designed for robotic vacuum cleaners are allowed.
Model comparison: where is the input in different versions
Xiaomi’s robotic cleaner lineup and Dreame sub-brand are all modified, and the location of water controls may vary, and understanding these differences will help avoid mistakes if you have multiple devices in your home or switch from one model to another.
| Model of the device | Type of tank | Location of the valve | Water volume |
|---|---|---|---|
| Xiaomi Vacuum Mop P | Combined 2-in-1 | Front, under the blue lid. | 200 ml |
| Xiaomi Robot Vacuum S10 | Separate water | Separate removable tank | 200 ml |
| Dreame D9 | Combined 2-in-1 | The front, similar to the Mop P | 200 ml |
| Roborock S5 Max | Integrated | Side/rear, electronic control | 290 ml |
As you can see from the table, the Xiaomi Vacuum Mop P uses the same logic as the Dreame D9, since they are technically very close devices. However, in older models or models of another brand (for example, Roborock), the design can be radically different: there the tank can be completely removable and inserted as a cartridge.
Always pay attention to color coding. In the Xiaomi ecosystem, blue traditionally stands for water treatments, and orange or gray for dry cleaning and filtration. If you see a blue cap or cover, that's your target for pouring.
What to do if the compartments are mixed up?
Typical errors and precautions
Despite the simplicity of the procedure, users often make systematic errors that shorten the life of the device, one of the most common is ignoring regular drying. After use, the water must be drained and the tank itself washed. Stagnation of water leads to bacteria multiplication and the appearance of mucous plaque on the walls, which then spreads to the floor.
Another mistake is the use of aggressive chemistry: chlorine, bleach, or acids can eat into rubber valve seals, and the tank will leak even when it's off, and this creates a risk of leaking into the internal components of the robot while it's working or charging.
⚠️ Warning: Don't use aromatic oils in their pure form. They can dissolve the plastic in the tank. If you want to flavor the cleaning, use a special wipe for robot vacuum cleaners that are attached to the outside of the tank lid.
And transportation is also worth mentioning. If you need to move the robot from one room to another, and there's still water in the tank, make sure the lid is as tightly closed as possible, and it's best to remove the tank or drain the water before you carry it, so you don't accidentally splash it inside the housing through the vents.
Setting the water supply level in the application
After physical refueling, you need to configure the device's operating logic through the Mi Home or Xiaomi Home app. From the robot control menu, select Clean or Mop mode. There you will find a humidification intensity adjuster slider.
The system offers three main levels: low, medium and high. For daily maintenance cleaning on laminate or linoleum, usually low or medium level, high level is designed for severe contaminants on tile or porcelain porcelain, where heavy wetting is required to soak dried dirt.
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Properly adjusting the water level in the application saves fluid flow and prevents the appearance of swelling on the floor after drying.
Some versions of the firmware have the Smart Carpet Detection feature, which, if activated, will automatically stop the water supply when it comes on the carpet (provided the carpets aren't too fuzzy and the sensors recognize them), which protects your carpets from getting wet.
Maintenance and cleaning of the feed system
Regular maintenance extends the life of the Xiaomi Vacuum Mop P. Once a month, it is recommended to carry out a preventive flush of the tank. To do this, fill it with clean water, add a little citric acid (if there is scale), shake and leave for 15 minutes. Then thoroughly rinse with clean water.
Be sure to check the condition of the outlet holes (nozzles) on the bottom of the tank or on the rag holder itself (depending on the revision of the model), they can be clogged with villi or salt deposits, clean them with a soft brush or toothpick, acting extremely carefully so as not to damage the calibrated hole.
If you notice that the robot has stopped wetting the cloth, even though there is water in the tank, check if the tank is properly installed. Sometimes it just isn't fully inserted into the housing, and the contact with the pump does not close. The characteristic click when installed is a good indicator of a proper fit.