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Summary of causes and how to repair water purifier pressure tank

Let's see how to fix the water purifier pressure tank in detail below:

1. How to fix a water purifier pressure tank that does not store water

The water tank of the filter does not hold water, which often happens with old pressure tanks that have been used for a long time. The filter is still working, but the amount of purified water filtered is not filled into the pressure tank. At this time, the pressure tank is often heavier than normal.

1.1. Air discharge for filter core

Reason

The phenomenon of the pressure tank not holding water may be due to the filter core being airtight. This situation comes from errors in the process of replacing the new core, when there is not enough experience or low skill. The filter core is airtight, causing air to clog, air is trapped inside the water purifier system, preventing water from entering the filter core. This causes the pressure tank to not hold water.

How to fix

You just need to release all the remaining air inside the filter core through the following steps:

• Step 1: Turn off the water purifier and unplug it to ensure there is no leakage or electrical short circuit.
• Step 2: Remove filter cups 1, 2, 3 and fill the filter cups with water to release air.
• Step 3: Reinstall the filter cups in the direction they were removed, making sure to tighten them tightly to prevent air from entering.
• Step 4: Connect the filter to the power source and check if the machine is working properly?

Details on how to fix a water purifier pressure tank that does not store water due to air monitoring in the following article: How to simply vent air for a water purifier at home

When the pressure tank does not accumulate water due to the filter core being blocked by air, it is necessary to discharge the air.

1.2. Replace filter cores 1,2,3 and RO core

One cause of the pressure tank not being able to accumulate water could be a clogged filter.

Reason

In case of clogged filter cores 1, 2, 3, the water purifier operates normally but the water flow is obstructed due to dirt on the filter core. The machine cannot filter water, causing the pressure tank to not store water.

When the RO core is clogged or damaged, the tank can still filter pure water, but this amount of water cannot pass through the RO core. You will notice a lot of waste water flowing out but the pressure tank still has no water.

How to fix

When filter cores 1, 2, 3, 4 are dirty or clogged, you need to remove each filter core in turn to check. If the filter core is close to the replacement period, you should replace the core according to the following steps:

• Step 1: Disconnect the power and water supply to the water purifier.
• Step 2: Remove the old filter cups.
• Step 3: Insert the new filter core into the filter cup.
• Step 4: Plug in the power, open the water valve and observe whether the filter is working properly or not.

If you still have questions about how to fix a water purifier pressure tank due to a clogged core, please refer to the detailed instructions here: How to change a water filter core at home simply in just 10 minutes .

Replacing the raw water filter and RO can fix the problem of the pressure tank having no water.

1.3. Repair broken pump

The pump is a very important part in the operation of the water purifier. Therefore, when the pump is broken, it can lead to many serious errors, including the pressure tank not storing water.

Reason

The booster pump plays a role in pushing water through the filter cores to convert normal water into pure water. When the pump is broken, the water will not be strong enough to filter through the RO membrane, resulting in no water going down to the pressure tank.

How to fix

A broken pump can come from many causes such as a weak pump, a burnt pump, a leaking pump... In case the pump is weak, you need to replace the new pump head or replace the new kit in the pump head. This method ensures the pump operates at the right capacity while still saving on repair costs.

See now: Fix broken pump at home 100% effectively here.

Booster pumps are damaged due to many reasons such as weak pumps, burnt pumps,...

2. How to fix a weak water filter pressure tank that can hold little water

The pressure tank is weak, storing little water, greatly affecting the daily life of the whole family. When you turn on the faucet, you will notice that the water flows very strongly. However, after only about 2-3 minutes, the water flow will gradually weaken and eventually run out of water.

2.1. Pumping air into the pressure tank

Cause

The most common cause of a low water pressure tank is air loss. The pressure tank does not have enough compressed air, the pressure drops so it cannot push water out or can only push a very small amount.

How to fix

In this case, you need to inflate the pressure tank according to the following detailed steps:

• Step 1: Disconnect the power and close the water supply valve to the water purifier.
• Step 2: Close the valve and remove the pressure tank.
• Step 3: Plug the pump head into the pressure tank valve and start pumping. At the tap above the pressure tank, you will notice a strong stream of water spraying out. When the water stops spraying and flows steadily, the pressure tank is lighter, you can stop pumping.
• Step 4: Close the valve and install the pressure tank back in its original position.

Pumping air into the pressure tank helps to overcome the situation of the tank working weakly and storing little water.

The process of inflating the pressure tank is relatively simple. However, to ensure the pressure tank works well again, you need to note the following:

• Do not use a motorcycle pump: The pressure tank contains a fairly low amount of pressure. Using a motorcycle pump will cause high pressure and cause the tank to explode. So it is best to use a bicycle pump.
• Do not overinflate: A pressure tank needs an average of 2kg/cm2 of compressed air to operate stably. When overinflated, exceeding this amount of air can cause the rubber balloon containing the air to burst, and the tank can hold very little water.

You should not inflate the pressure tank with a motorcycle pump, it can easily cause the tank to explode.

2.2. Replace when the pressure tank is punctured.

Besides the case of running out of air, a punctured pressure tank is also a common cause of a weak tank that cannot hold water.

Reason

Similar to the above case, when the rubber membrane of the pressure tank is punctured, it will lose the necessary amount of air to push the water out. This leads to the tank working poorly and not being able to store water. The specific way to repair the water purifier pressure tank is as follows:

How to fix

When inflating, if you see the pressure tank inflated for a while and then goes down, and no water is collected, then your tank is definitely punctured. If you try to inflate the tank, it will only work for 1-2 more days and then return to its old state. In this case, it is best to replace the tank with a new one.

Replace the pressure tank if the rubber membrane is punctured.

2.3. Troubleshooting weak pumps

The pressure tank has little water due to a weak water pump, which is a rare situation. However, if your pressure tank is weak and does not fall into In the above cases, it may be due to a weak pump.

Reason

When the pump is weak, the water does not have enough pressure to pass through the RO membrane. Therefore, the pressure tank can only hold a small amount of water.

How to fix

You can check if the booster pump is weak by observing the drain tap. Then cover the water line with your hand for about 15-20 seconds to see if it can be blocked. If not, your pump is still working normally. On the contrary, if it is weak, you need to replace the pump head or replace the pump head kit with the following steps:

• Step 1: Remove the pump from the machine and then remove the pump head.
• Step 2: Remove the kit and replace it with a new one.
• Step 3: Reassemble the parts and test run the machine to see if it works.

You can refer to: The simplest way to repair water purifier pump at home here.

Weak pump is a rare phenomenon during the use of water purifier.

3. How to determine if the water purifier pressure tank is damaged or still working well

Weak water purifier, no water output is a common situation. However, many people do not know whether this situation is due to the pressure tank of the purifier or not? Therefore, Mutosi would like to share how to determine if the pressure tank of the water purifier is damaged or still working well. Damaged pressure tanks often have the following symptoms:

• The pressure tank is heavier than normal, when shaking there is water at the bottom of the tank.
• The tank loses air and cannot push water out, resulting in only a small amount of water coming out of the faucet.
• Rubber membrane puncture: When inflated, the air only works for 1-2 days and then the water comes out weakly as before. When pressing the pressure tank valve, water will flow out.

A damaged water purifier pressure tank is often heavier than normal.

Through the above sharing, I hope you have clearly understood how to repair the water purifier pressure tank . If you have applied the above methods but the error is still not resolved, please contact the Mutosi water purifier repair and maintenance service hotline (Procare) 02473033865 for the fastest support!