Because an air compressor usually develops a great deal of condensation during operation, it can create a problem for people using paint sprayers. However, that problem can be solved.
Using a filter regulator, like the one seen to the left, you can separate moisture from the air before it gets to the paint line. This will ensure that you have optimally dry air to maintain a smooth and even application.
Mount the water separator filter to the wall above your air compressor. The filter typically should be set at 90 psi.
Connect your compressor's air output to the inlet on the water separator with a flexible hose. This will feed the air into the filter to be processed. Then connect the inlet of the sprayer attachment to the outlet of the filter using another flexible hose.
As the air from your compressor moves through the water separator, it will remove the moisture and pass clean-dry air through the second hose and out through the sprayer.