How to Drain an Air Compressor?

Air compressors can be very useful when you have odd jobs around the house, or you may even need to use them for business purposes. Whatever you need to use them for they will certainly do the job you require, but you must make sure that you do maintain them properly. If you don’t maintain them properly, then you could cause all different types of problems with the compressor, and it may even stop it from working correctly. Plus, you could also be putting your life and other people’s lives in danger.

Best of Machinery have put together everything you need to know about how to drain your air compressor and why you should drain it just below.

Why is it Important to Drain your Air Compressor?

If you want to maintain your air compressor properly, then you will need to make sure that you drain the water out of it on a regular basis. This is because when you’re using the air compressor each time it will generate water and this can mount up. This can risk your tanks maintenance because the water is actually able to get into the tank and you won’t really know what damage that could do, or it could even lead to other problems in the air compressor.

Also when you’re using the air compressor, you won’t want it to end up blowing out water as well as air. This is because this could damage your tools as well, plus, the water will keep filling up in the tank.

How to drain It?

First of all your tank should be drained every couple of days or at least once a week. Here are the steps about how to drain the water out of your air compressor:

1. You will need to check the pressure gauge first.
2. Make sure there is some pressure in the tank before you do drain it.
3. Turn the compressor off and open the drain tap.
4. To find out where the drain tap is located you will need to look in the manual of the air compressor and it should give you all the information about it in there.
5. Once you have done this, you will start to feel the condensation and water blowing out.
6. Wait until the tank is completely empty.
7. When the tank is finally empty, you can then close the tap, by simply pushing it back up.
8. Your air compressor will then be fully drained, and you should do this at least once a week.

Do you need to Drain it on a Regular Basis?

In short, you do need to drain your air compressor on a regular basis. This is because the water will keep on rising in the tank and the more you don’t drain it the more water will be in the tank. This could cause you major problems with your air compressor, and it will affect how you are able to use it and how your tools will operate when you are using it.

Therefore you don’t need to drain it every single time that you use the compressor, but if you do use it on a daily basis, then you will need to drain it every couple of days. Otherwise, it could cause you problems.

How to keep Water out of the Air Compressor?

Although you can never stop a little bit of water forming in your air compressor, there are ways that you can actually decrease the amount of water that will form in the tank. You can do this by using a dryer to remove the water droplets inside the tank. However, it must be noted that when you do use this, it won’t be able to remove the water vapor that is produced when you’re using the air compressor itself.

There are several different dryers that you can actually buy; you can buy a refrigerated type of air dryer, which works like an air conditioner. The second type of air dryer that you can purchase is a desiccant one, which purifies the compressed air and then absorbs the moisture from it. The third type of dryer is a piping system, and this plumbs into your airlines to remove any moisture from the compressor.

Why does it make so much water?

An air compressor can withstand a hell of a lot of pressure, and in order to be able to do this, they have to be built from certain types of materials. Therefore the inside of the tank has a moisture resistance coating, and this means that it will stop any water from forming on the steel inside of the tanks. This means that the moisture from the heat in the tank will start forming at the bottom and will fill up more each time you use it. This can also start creating rust in your tank if it is not maintained properly, which I’m sure is the last thing that you will want.


Air compressors are great to use, but you just need to make sure that you keep them maintained; otherwise, they could actually cause you a lot of problems when you want to use some of your tools. One thing you must do is drain any water that is likely to start filling in the tank of your air compressor. This is because it can cause things like rust.


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