Air compressors are designed to build and increase the pressure, but this is not possible due to a high rate of compressor leakages. The drain valve is one thing to specifically check. Ensure your compressor tank is before starting it after tank drain because most people don’t usually close the tank of their compressor before they start after drain activities. Otherwise, as soon as you start it and the compressor is running, the air tank will create a leakage and it wouldn’t be built any pressure.

In the case of the right airbrush for compressor of an existing airline connector that is linked to the compressor, there will be linkages as the compressor pump can squeeze it. It is possible for a pneumatic tool or air gun or something similar to open and detach. Most time it is the compressor pump that usually has issues.

The reason why air pressure won’t build

An air compressor can attempt to increase the pressure, but because of a large compressor leak, this is not feasible. For a fast check, examine the valve on the tank drain. Before starting the compressor, be sure to close the tank if the tank drain is open. Otherwise, the air velocity will flow more rapidly than the velocity at it arrives. Since the compressor can operate, this is a major issue, but it lacks pressure. The way out for these is for you to remove and replace the pump with the same model or recommended type.

Other factors that can cause an air compressor not to build pressure. The below factors can be check when you your air compressor is leaking either at a small or big rate.

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Verify the seal of the pump

The seals with valve plates are mounted on top of the compressor. In the lower part of the pipe, the key purpose of the pump seal is to provide control of the incoming air. Then the air passes to the compressor tank through the pressure valve.

Some valve seals will eventually begin to deteriorate. This also occurs when there is a low-quality compressor with dubious settings and links When the compressor starts or when it exceeds a certain pressure in the tank, you can experience the leakages issue.

Cracking can result from pressure on the seal. As a result, air from one side to the other will begin to flow out, but will not drive into the tank. It will work fine with the compressor, but there wouldn’t be any built-in pressure. In this case, it is advisable to remove the whole pump completely and get another one that is suitable for your type of compressor and fit it appropriately.

A defect in the piston rings of the pump

This is another thing that can prevent air pressure from being increased by the compressor. Air will continuously leak from the oil-filled tube if the piston ring fails. You may conduct degradation to work around this problem. Make sure the inside of the cylinder is correctly tested while doing this.

The metal contact of the worn rings on the piston should not harm any compartment. The issue should be solved by this. If this fails and it is still difficult to calculate the ambient pressure, you can try the solution provided in the next section.

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Air exits through the valve

This could be an issue with the main valve of the pump if the pump suction bursts while the pump is still running. When air comes out of the intake periodically or constantly, there is a risk of valve failure.

What To Do During Air Tank Leaks?

Is your air compressor is not building up pressure? After each operation, it is advisable and a great way of maintaining an air compressor is to empty the tank. Although, sometimes operators can fail to close the exhaust plug of the compressor tank.

This mistake allows the air from the compressor tank to escape and decreases the pressure. Early detection and frequent tests with a checklist will guarantee the notice of the air tank are intact. Air leakage from the compressor tank, along with corrosion, may also be excessive. When frequently checking is not conducted.

Corrosion of condensate wastewater is also a common cause for air tanks, in addition to environmental conditions. Most time after the use of the compressor, manufacturers instruct operators to open the tank drain valve. Failure to follow this process can result in water and corrosive elements being gathered.

NOTE: A leakage from any part of the tank will result in a loss of approximately 50% of the total output of compressed air. Repairing this chamber is simpler when the drain valve fails. Otherwise, it is important to replace the hole in the metal-air tank. Be ascertained that the tracheal attachments are attached securely as well.

If there is a defective check valve in your air tank, air will leak out of the vent. Try to check that when the pump is idling. If air is still escaping, you can then replace the non-return valve. A significant element that prevents the return of compressed air to the pump is the non-return valve.

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The pump outlet head will have high air pressure when this part is faulty. This will influence the pump motor’s power and stop it from restarting when the tank is full. However, when the air tank is empty, the engine starts. Replace the non-return valve instantly to correct this mistake.

Other factors that cause air tank leaks are long usage of the air tools, low-quality accessories of air tool materials, hose connections losing status, and poor management of the air tool.


Every operator’s air tool operation needs to be careful when they discovered their air compressor does not build pressure. Most modern brands of air compressors like Makita and Dewalt have sensors that activate secure modes of shutdown when this type of situation occurs. But to avoid expensive damage, operators may rely on an integrated air compressor system. Instead, the troubleshooting techniques of our air compressor will help you to diagnose the pressure loss.