How to Remove Water from Air Compressor – Complete Guide 2023

Five-minute read

An air compressor allows you to easily power your air tools and to perform a wide range of projects. However, one common issue with many commercial grade and home garage air compressors is water accumulation in the tank, so many users asked us: “How to remove water from air compressor?”. So we will try to discuss this topic in detail.

When water is present in the form of condensation or other sources, it can affect the air compressor’s performance and even lead to a decrease in operating efficiency. That’s why we’ve put together this comprehensive guide on removing water from an air compressor, so that you can optimize its performance while ensuring everyone’s safety.


How to Remove Water from Air Compressor?

To start, it is important to understand why water can accumulate in the compressor tank. Condensation occurs when the warm air inside the tank passes through a cooler part of the system, such as a filter or the release valve. This causes moisture from the air to collect on the various components and settle at the bottom of the tank. Additionally, other sources of water can also enter the tank, such as from leaky seals or connections.

How to Remove Water from Air Compressor

To remove water from air compressor, first open up the drain valve at the bottom of the tank and completely empty any water that is present. Then, check for any leaks or faulty components that could be allowing water into the system. Finally, you can use an air filter to separate out any moisture that is still in the tank.

What Is the Best Way to Dry Compressed Air?

There are several ways to remove water from your air compressor. The most effective is drying the compressed air before it enters the tank. This can be done using a desiccant dryer, which uses a type of chemical compound to absorb moisture and keep the system dry. Alternatively, a refrigerated dryer works similarly but by chilling the incoming air and removing the moisture in the process.

Steps To Remove Water from Air Compressor:

If your compressor has already accumulated water, you can use a combination of different methods to get rid of it. Removing water from an air compressor is a simple process that involves draining water from the bottom of the tank and ensuring that all parts are clean and dry. Here are some steps to follow:

Step 1 – Drain the water from the tank:

Use the drain valve located at the bottom of your air compressor to drain out any water that has accumulated in the tank.

Step 2 – Clean and dry all parts:

Make sure to thoroughly clean and dry components such as filters, hoses, and other areas where water may have collected. This will also help prevent accumulation of water in the future.

Step 3 – Check seals and connections:

Inspect all seals and connections to make sure there are no leaks or other sources of water entering the tank.

Step 4 – Use a dehumidifier:

If you are in a humid climate, it may be beneficial to use a dehumidifier in the area near your compressor. This will help reduce moisture in the air and prevent water from accumulating in the tank.

By following these steps, you can remove water from air compressor and extend its life span for longer-lasting performance. If you want to optimize the performance of your compressor even further, it’s recommended that you use a quality oil-water separator in combination with regular maintenance. Doing so will ensure your equipment is safe and reliable throughout the years.

What Causes Moisture in Compressed Air?

Water accumulation in air compressors is caused by condensation, which occurs when the warm air inside the tank passes through a cooler part of the system. Other sources of water, such as leaky seals and connections, can also cause water to enter the tank.

How Is Moisture In Compressed Air Measured?

Moisture in compressed air can be measured using a dew point meter. This measures the temperature at which water vapor will condense into liquid droplets, providing an indication of moisture content in the air. Other methods such as refrigerant dryers, desiccant dryers, and coalescing filters can also be used to measure and remove moisture from compressed air. In addition to these methods, it’s also important to check for visible signs of water accumulation on a regular basis. This will help you identify any potential issues with your air compressor and take preventative measures before the problem becomes too serious.

10 Disadvantages of Having Too Much Moisture in Your Air Compressor:

1. Reduced air pressure and flow:

Excess water in the system can reduce the air pressure and volume, resulting in less efficient operation of your tools.

2. Corrosion:

Moisture can cause corrosion on metal parts, leading to premature wear and tear of components.

3. Increased energy consumption:

Water accumulation increases the load on the compressor, requiring more energy for operation.

4. Frost build-up:

When temperatures drop below 32°F (0°C), any moisture that is present will turn to ice and may interfere with the normal operations of your compressor.

5. Build up of contaminants:

Dirt, rust, and other particles can stick to wet surfaces, leading to clogged filters and decreased efficiency.

6. Premature failure of components:

Water can cause premature failure of sensitive components such as valves, seals, and filters.

7. Reduced lifespan:

Over time, excess moisture can damage internal parts and reduce the life expectancy of your air compressor.

8. Costly repairs:

Routine maintenance becomes more frequent when dealing with water accumulation in the tank, leading to additional repair costs down the line.

9. Poor performance:

When there is too much moisture in the system, it can result in poor performance of your tools and machinery due to reduced airflow or pressure.

10. Safety hazards:

Excess water can create dangerous working conditions due to ice build-up or electrical short circuits caused by moisture.

To avoid these issues, it’s important to take the necessary steps to properly maintain your air compressor and prevent excess moisture from accumulating in the tank. This can include regularly draining water from the tank, inspecting and replacing seals and connections, using a dehumidifier, and using a quality oil-water separator. Following these steps will help keep your air compressor running at peak performance for years to come.


Removing water from an air compressor is important in order to maintain its performance and ensure safety. I hope that you’ve now learnt how to remove water from air compressor. By following these steps, you can easily drain out any excess water from the bottom of your tank, clean and dry all parts, check for leaks or other sources of water entering the tank, and use a dehumidifier if necessary. Doing so will help optimize the performance of your compressor while ensuring everyone’s safety. Additionally, it’s recommended that you use a quality oil-water separator and perform regular maintenance in order to extend the life span of your compressor.

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