Refilling the cartridge of the Xiaomi dispenser: a complete guide with photos, tips and typical errors

Xiaomi water dispensers (including Viomi and Mijia models) have become an integral part of many homes thanks to their convenience, compactness and integration into the smart home ecosystem. However, over time, any filter cartridge requires replacement or refilling, and users face the dilemma of buying original consumables at a high price or learning to refill them themselves.

In this article, we will analyze the unique features of refilling cartridges for Xiaomi dispensers that are not applicable to other brands: from choosing the right filler to bypassing software locks in smart models. You will learn what errors lead to leakage or deterioration of water quality, how to check the leakage after refueling, and why some cartridges are "not seen" by the system after refueling. V1/V2, Mijia Smart Water Dispenser and its analogues.

We warn you right away: self-fueling is not warranty (if it is still valid), but with the right approach, it is not inferior in efficiency to the original cartridges.

1.What cartridges are used in Xiaomi dispensers and can they be refilled?

Xiaomi dispensers use two types of cartridges:

• 🔹 Coal filters (e.g, VFILT001 or VFILT002) — They remove chlorine, they remove organic impurities, they improve the taste of the water, and they can be filled with activated charcoal in the food grade or special class.
• 🔹 Combined filters (e.g, VFILT003 with ion exchange resin, which further softens the water and the reduzieren heavy metal content, and is filled with a mixture of coal and resin in proportion to the water. 70/30.

The manufacturer does not officially support refueling, but the design of most cartridges allows you to disassemble them without damage. V3), where the filter is integrated into the cleaning unit: their filling requires a soldering iron and electronics skills.

Not all cartridges are refillable, such as filters for reverse osmosis models (e.g. Viomi). RO) They contain a membrane that you can't clean at home, and you have to change them completely.

2.What you will need for refueling: tools and consumables

Before starting work, prepare:

• 🔧 Flat screwdriver (for disassembling the cartridge body).
• 🧴 Silicone lubricant (for sealing rings).
• 🧂 Filler: For carbon filters: granular activated carbon (marks) CARBOPAL or JACOBI). For combined: a mixture of coal and cationite resin (for example, Purolite) C100E).
• 🧼 Distilled water (for washing).
• 📏 Kitchen scales (for precise dosing of filler).

Critical point: never use coal for aquariums or household analogues (for example, from a pharmacy) - they are not designed to clean drinking water and can emit harmful substances.

Cost of consumption for one filling station:

For comparison: the original cartridge VFILT001 It costs 1,200-1,500. ₽, And it costs 200 to 400 to refuel. ₽. The savings are obvious!

3. Step-by-step instructions: how to disassemble and fill the cartridge

The refueling process consists of 5 steps. Follow the instructions strictly in order to avoid errors.

Step 1: Removal of the cartridge

1. Disconnect the dispenser from the network and shut off the water supply.
2. Press the Release button (or pull the lever if the model is without a button) and remove the cartridge.
3. Wash the cartridge body with warm water to remove the remnants of the old filler.

Step 2: Disassembly of the hull

In most models, the body is fastened by latches or a threaded connection:

• 🔹 If the case is plastic with latches: carefully apply a screwdriver around the perimeter (start from the place of the joint).
• 🔹 If the case is threaded: scroll the top counterclockwise.

Step 3: Removal of old filler

Sprinkle waste charcoal or tar in a bag (which can be used to clean air in the refrigerator or shoes); thoroughly rinse the inner nets and membranes (if any) under running water; do not use detergents; residues of chemistry will spoil the taste of the water.

Step 4: Refilling with a new filler

The weight of the filler depends on the cartridge model:

• 🔹 For VFILT001 (coal: 180–200g of coal.
• 🔹 For VFILT003 (combined): 140g coal + 60g resin.

Fall asleep the filler gradually, shaking the body to avoid voids. Once filled, close the cartridge and check the seals tightness.

Step 5: Installation and washing

Put the cartridge back in the dispenser and turn on the water supply. The first 5 to 7 liters of water drain, which is necessary to remove coal dust. If the water is cloudy or smelly, rinse for longer.

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After refueling, mark the date on the cartridge body with a marker: the recommended replacement/refueling interval is every 6 months or after filtration of 1500-2000 liters of water.

4.Typical mistakes and how to avoid them

Even experienced users sometimes make mistakes that lead to leaks or poor water quality.

⚠️ If the dispenser gives an error after refueling E1 or E2, It means that the flow sensor is not detecting the passage of water, because of the wrong cartridge assembly or clogging of the membrane!

Mistake 1: Occupational rings skewed

Symptoms: water leaks from under the cartridge. Solution: lubricate the rings with silicone lubrication and set them strictly in the grooves. Don't use petroleum petroleum jelly or oils, they corrode rubber!

Mistake 2: Inadequate flushing

Symptoms: water that's black or charcoal-scented. Solution: drain the water until it's clear. It takes an average of 10 to 15 liters.

Mistake 3: Use of inappropriate coal

Symptoms: water has a metallic taste. Solution: buy coal labeled "for drinking water" (e.g., "drinking water, CARBOPAL CW20). Pharmacy charcoal is not suitable!

Mistake 4: Forgot to reset the resource meter

In smart dispensers (for example, Mijia Smart) after refueling, you need to reset the filter counter through the Mi Home application:

1. Open the app and select your dispenser.
2. Go to Settings. → Filter → Reset the meter.
3. Confirm the action.

5 How to cheat the system: resetting the filter counter in smart models

Xiaomi Dispensers with Mi Home support track the filter resource and block work after the expiration date. After refueling, the meter must be reset, otherwise the system will show a Filter Expired error.

Method 1. Through the Mi Home app

1. Open Mi Home → select the dispenser.
2. Go to Settings. → Filter → Replacement of the filter.
3. Confirm the replacement (the system will reset the meter automatically).

Method 2. Through the Engineering Menu (for advanced)

If the application does not allow you to reset the meter, use an alternative method:

1. Turn off the dispenser from Wi-Fi.
2. Press and hold the Power button for 10 seconds until the indicator flashes.
3. Connect to the dispenser via Bluetooth via Mi Home and reset again.

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If the dispenser still shows an error after reset, check the firmware version. Older versions (below 1.4.5) may require an update via Mi Home.

Some models (e.g. Viomi) V3 Pros have a hardware lock, they recognize the original cartridges from the chip, in which case the system can only be fooled by installing a chip emulator (sold on AliExpress for 200-300). ₽).

Alternative methods: refueling without disassembly

If you can not disassemble the cartridge (for example, due to ultrasonic welding), you can use the washing method:

1. Load the cartridge in a container of warm water (40-50)°C by 1 hour.
2. Add a 10% solution of citric acid (to remove scale) to the water.
3. Rinse under running water for 10 minutes.
4. Dry the cartridge with a hair dryer (cold air!) and install it back.

This method is less efficient than full refueling, but extends the life of the filter by 1-2 months.

Advantages of the method:

• ✅ Doesn't require disassembly.
• ✅ Quick (takes up) ~1.5 hours).

Disadvantages:

• ❌ Does not restore the ion exchange resin resource.
• ❌ Cleaning efficiency drops by 30-40%.

7. Frequent questions and myths about cartridge refilling

We will discuss the most popular questions and debunk myths.

8.Conclusions: Should you fill the cartridge yourself?

Self-refueling cartridges for Xiaomi dispensers is a profitable solution, but not for everyone.

Pros:

• ✅ Savings of up to 70% compared to buying new cartridges.
• ✅ Ability to use premium fillers (e.g. coal) JACOBI).
• ✅ Environmentally friendly (less plastic waste).

Cons:

• ❌ It takes time and care.
• ❌ Risk of leaks with improper assembly.
• ❌ Smart models may require bypassing locks.

Who is suitable: those who are ready to pay attention to detail and have basic skills in working with technology.

Who doesn’t: If you have a model with an authentication chip (like Viomi) V3 Pro) and no desire to mess with emulators, or if the dispenser is warranty-free.

On average, refueling pays off after 2-3 cycles. If you use a dispenser daily, self-maintenance will save you up to 5,000-7000. ₽ yearly.

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For maximum cartridge life, wash it once a month with a weak solution of citric acid (1 tbsp. spoon per 1 liter of water). This will remove the accumulated salts and prolong the resource of the resin.