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Summary of causes and solutions when the pressure tank does not accumulate water

In case you are not a knowledgeable person about the product at home, you can call a professional unit to handle the situation where the water purifier does not work or buy a new hot and cold water purifier (the machine is too old, often has minor errors, does not meet other health safety standards,...).

1. Water does not enter the pressure tank because the filter core is blocked with air.

Filter core is blocked is a common phenomenon that occurs when air is blocked inside the filter core. This makes it impossible for pure water to pass through the filter core to be charged into the pressure tank.

Reason

The main cause of this situation is due to errors in the process of replacing the filter core when installing the water filter cores without releasing all the air inside. Besides, it may be due to the process of using, the filter core is leaking, causing air to enter the core, causing blockage and the water flow cannot pass through.

Air trapped filter core is the cause of the pressure tank not storing water.

How to fix

When the water purifier has no water in the pressure tank due to the air-tight filter, you just need to release the air from the filter according to the following steps:

• Step 1: Unplug the filter and turn off the water valve.
• Step 2: Remove the filter cups of filter cores 1, 2, 3 in turn, then fill the filter cup with water to push the air out.
• Step 3: Reinstall the filter cups in their original positions.
• Step 4: Connect to the power source, open the water valve and check the operation of the water purifier.

You can refer to the detailed instructions in the article: Instructions for flushing the filter core in just 5 minutes .

If the filter core is filled with air, you need to vent the filter cores according to the correct instructions. step

2. Water does not enter the pressure tank because the coarse filter is clogged.

After a period of use, the coarse filter core accumulates dirt and is not replaced on time, causing too little water to enter the membrane. As a result, there is not enough pressure to release pure water, leading to the water purifier not having water in the pressure tank.

Reason

The phenomenon of clogged coarse filter core is the result of the coarse filter core not being replaced on time. This not only affects the life of the core but also makes the filter operate unstable. Normally, the replacement time for each specific type of core will be:

• Core No. 1: 3-6 months
• Core number 2: 6-9 months
• Core number 3: 6-9 months

The coarse filter core is not replaced on time and can easily become clogged, affecting the operation of the machine.

How to fix

In this case, the most effective measure is to immediately replace the new filter cores in the following way:

• Step 1: Remove the old filter cups from the machine body by hand or using a wrench.
• Step 2: Install the new filter in the correct order into the filter cup.
• Step 3: Tighten the filter cup, reinstall the filter cup into the machine in its original position.

You can replace the filter yourself at home in just 5 minutes.

Currently, some modern water purifier suppliers use an 8-core RO filter system with 9 levels of water treatment and an electrolysis unit consisting of many electrode plates, automatically flushing the electrodes to solve the problem of water not entering the pressure tank due to clogged rough filter cores. This not only optimizes long-term costs but also increases the alkalinity of the water to a stable high level, ensuring the health of consumers.

3. Water does not enter the pressure tank because the RO membrane is clogged.

In addition to the coarse filter, a clogged RO membrane is also the main reason why the water purifier has no water entering the pressure tank. Because after being processed by filter cores 1,2,3, the water will continue to go through the RO core. If the core is clogged, it will block the water flow, so you will notice that the faucet leading to the pressure tank has no water.

Reason

The RO filter membrane needs to be replaced periodically every 24 - 36 months, otherwise dirt will accumulate and cause blockage, resulting in water not entering the pressure tank.

After about 24 - 36 months of use, the RO membrane needs to be replaced.

How to fix

You can completely replace the RO core at home if you follow these steps correctly:

• Step 1: Remove the old RO filter membrane, take the old filter core out of the filter cup.
• Step 2: Install the new prepared filter core into the filter cup.
• Step 3: Tighten the filter cup, install the RO filter membrane into the machine in the same position.

For detailed instructions, please find out more information at: href="https://mutosi.com/tin-tuc/giai-phap-nuoc-sach/thay-loi-may-loc-nuoc" rel="noopener" target="_blank">5 minutes to change RO water filter core simply at home.

The steps to replace the RO membrane are similar to those for the coarse filter cores.

4. Water does not enter the pressure tank due to pump loss of pressure.

For water to enter the RO filter and accumulate in the pressure tank, the pump must create a minimum pressure of 40psi. If it is lower than this level, the water purifier has no pressure, the pump does not have enough force to push water through the RO and accumulate in the pressure tank for use, meaning water cannot enter the water purifier's pressure tank.

Reason

The main cause of this phenomenon of the water purifier having no pressure is usually due to the pump's power source not being enough to supply. In addition, some other cases such as burnt adapter power source, broken pump can cause the pump to lose pressure.

Pump pressure loss will prevent water from being pushed through the RO core and filtered into the pressure tank.

How to fix

First of all, you need to clearly identify the cause of the water not entering the water purifier's pressure tank or the pump losing pressure to have the most reasonable solution. If this phenomenon originates from the power source, immediately replace the pump with a new power source to ensure power for the pump to operate.

If the pump loses pressure due to a burnt adapter, what you need to do now is replace a new adapter following these steps:

• Step 1: Remove the two screws below to remove the adapter from the machine.
• Step 2: Connect the new adapter correctly, then check if the pump is working properly again.

In case you have followed the above steps correctly but it still does not work, it is likely that the pump in your home is broken. To save on repair costs, the best way is to replace the new pump head or replace the new kit in the pump head.

For details on how to replace, please refer to: How to repair a simple water purifier pump at home.

To save repair costs, you can replace the pump head.

5. Water does not enter the pressure tank due to one-way valve

The one-way valve of the water purifier has the function of opening the water flow from the RO membrane to the pressure tank and preventing the water from flowing back into the waste water line. Therefore, when the valve has a problem, the water will not be filled into the pressure tank but will go out through the waste water line.

Reason

The most common cause of this phenomenon is due to the one-way valve being blocked by some obstacles such as dirt, waste during use. In addition, a broken valve can also lead to the pressure tank not being able to accumulate water.

A malfunctioning one-way valve greatly affects the operation of the water purifier.

How to fix

To solve the problem of the water purifier not having water in the pressure tank, first remove the valve from the water purifier, check and gently remove any obstructions.

In case the one-way valve is damaged, replace it with a new one immediately as follows:

• Step 1: Prepare the necessary tools and a new one-way valve.
• Step 2: Attach the sealing gasket to the valve flange.
• Step 3: Place the valve in the correct position and tighten the screws and bolts to secure the one-way valve.

In case the one-way valve is damaged, you need to replace it with a new one.

6. Water does not enter the pressure tank because the pressure is too high.

This is one of the very common phenomena when using water purifiers. The pressure tank has too high a pressure (>8psi), higher than the water flow pressure from the RO core. This makes it impossible for water to enter the pressure tank due to the pressure difference.

Reason

High pressure tank pressure > 8psi is usually due to the pressure tank being over-inflated. Another case when the safety valve is broken, the pressure tank does not automatically release air can also easily cause this condition.

The pressure tank has a pressure too high for the pump, causing water to not be able to fill the tank.

How to fix

When you notice that the pressure in the pressure tank is higher than normal, you should release the gas from the tank in 2 steps:

• Step 1: Remove the pressure tank.
• Step 2: Slowly release air from the pressure tank and use a gauge to ensure the tank pressure is between 5 and 8 psi.

You may be interested in: How to fix a water purifier that doesn't produce water

In this case you need to vent the pressure tank to reduce the pressure in the tank.

7. Water does not enter the pressure tank because the tank is out of compressed air.

After a period of use, usually after 18 - 24 months, the pressure tank will lose a certain amount of gas, causing the pressure of the tank to drop below 5psi. Therefore, pure water is accumulated in the tank but there is not enough force to push it up to the faucet, causing many people to mistakenly think that the tank has no water.

The phenomenon of pressure tank running out of compressed air is due to the pressure tank losing air or the tank being punctured .

How to fix

When encountering this situation, the most effective solution is to inflate the pressure tank according to the following steps:

• Step 1: Lock the valve and remove the pressure tank.
• Step 2: Plug the pump head into the pressure tank valve and proceed. Pump until water stops spraying and flows steadily.
• Step 3: Close the valve and reinstall the tank.

If during the inflation process you notice that the pressure tank inflates for a while and then goes down again, and no water is collected, it is likely that the tank is punctured. In this case, it is best to replace the tank with a new one.

>>> Reference: 13++ best-selling hot and cold water dispensers at Mutosi.

When the pressure tank is punctured, the best solution is to replace it with a new one.

In case you have performed the above measures correctly but they are not effective, please refer to Mutosi's Procare home water purifier maintenance and repair service. Not only does Procare provide free inspection and quality water purifier care services, but it also provides genuine components with high durability, minimizing the above errors.

In particular, with a system of more than 5500+ repair points nationwide, your problem will be immediately resolved. So don't forget to contact the Mutosi water purifier repair and maintenance service hotline (Procare) 02473033865 if you have any problems that need to be solved!

Mutosi's Procare service has a large system nationwide.

In the above article, Mutosi has shared with you the causes and solutions when the water purifier has no water in the pressure tank . The water purifier is an indispensable smart device in the life of every family. Therefore, find out the cause soon and have an effective solution when encountering problems with this device.

If you are wondering which brand of water purifier is the best or which type of home water purifier is good , you can refer to Mutosi!