Filters

Your air suspension system has a lot of different components, and some of them can have unwanted consequences. For example, your compressor (the part the puts air in the tank) gets hot when it's running, which then puts hot air into your air tank. That tank can be room temperature or even cold when that hot air hits, creating condensation. If that gets out to your valves, it can cause them to rust or get damaged, which means they could stick open or closed at an inopportune time. Nobody wants that. 

The solution comes in the form of filters. These filters trap the moisture created by the compressor and store it in a container, removing the possibility that your valves see the liquid. While there aren't filters that are 100% effective, these do a great job of restricting the water that exits your tank from causing excessive damage. Think of it as preventative maintenance for your air setup.