CleanAir coalescer filters remove water, dirt and oil from the system down to .01 micron. DeVilbiss coalescer filter units are designed with a quick-release bowl and spin-off element for filter changes without tools. In addition, a filter-change indicator alerts the operator when the element requires changing. Ideal for most spray applications, especially where oil aerosols may be a problem. Automatic bowl drain and 6' hose eliminate oil and water buildup (standard feature), so there is no need to manually drain the system.