How to Install an Air Filter on an Air Compressor

Here’s a step-by-step process that works for most compressed air systems:

Step 1: Shut Down and Depressurize

Always turn off the compressor and release air pressure before opening any filter housing. This prevents accidents and protects the equipment.

Step 2: Locate the Filter Housing

Filters are usually installed on the compressor outlet, in-line with the piping system, or near the point of use (before tools or machinery).

Step 3: Remove the Old Filter Element

Open the filter bowl or housing, carefully pull out the old element, and dispose of it. If it’s clogged with oil or dirt, you’ll see why replacement is critical.

Step 4: Clean the Housing

Wipe down the inside of the bowl and check seals or O-rings. A clean housing prevents leaks and keeps the new filter performing properly.

Step 5: Install the New Filter Element

Insert the new element, making sure it’s seated correctly. Double-check flow direction arrows on the housing if applicable.

Step 6: Reassemble and Pressurize

Close the housing, restart the compressor, and slowly repressurise the system. Listen for leaks and check that airflow is steady.

Step 7: Record the Installation Date

Log the date so you know when the next replacement is due. Most filters should be changed every 6–12 months, depending on operating conditions.