Air header valves are used to control the air pressure and flow rate. In addition to that, they have a few other functions like isolation, venting, etc. But how do you know which one is right for your system? Can you choose the right size air header valve without making a mess of your plant? Well, I'll give you a heads up: no, there isn't. But, with a little help from an industry expert, you can pick the right size air header valve for your system.

How do you know if your air header valve is too big or too small for your system?

To determine the size of your air header valve, you will need to consider the following factors:

1: Pipe Size

The first thing you need to know is the size of your air header valve. This will help you determine the size of your air pipe. If you need a pipe size chart, I suggest heading to the manufacturer's website and using their online tool. The air header valve is usually attached to the pipe via a threaded union.

2: Pipe Length

The next thing you should look at is the length of the pipe. The size of the air header valve is important in order to maintain the proper air pressure in the vehicle. If you need to know what pipe length you need, I'd suggest measuring your pipe (usually inside the valve) and entering the measurement into the manufacturer's online tool.

3: Pipe Diameter

The diameter of the pipe is the most important factor to consider when selecting the right size air header valve. Pipe charts are usually found on the packaging of pipes or on the website of the pipe manufacturer. I suggest contacting the manufacturer and asking for a pipe diameter chart.

4: Air Pressure

The air pressure is the final thing you need to consider when choosing the right size air header valve. You might want to ask your local plumber for assistance. The air pressure in your home affects the way your plumbing works and can even make your water heater work better.

5: Air Flow

When calculating airflow, you need to know the air pressure and the pipe size. The airflow is determined by multiplying the air pressure times the pipe size divided by 0.762.

6: Air Headers

Some air header valves have an internal air header that can be adjusted to regulate airflow. Others have an external air header that has to be attached to the valve itself. If you need more help, feel free to call the manufacturer's customer service line and ask about the size of your air header valve. They should be able to assist you.


To choose the right size air header valves, first, measure the flow rate of the air being discharged. Then, select the appropriate valve size based on the measured flow rate. Finally, ensure that the valve size matches the discharge outlet of the air conditioning unit. Following these steps will ensure that the air conditioning unit operates at its maximum efficiency.


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