Watts FluidAir 504-02 Pneumatic Filter Assembly

The Watts FluidAir 504-02 Pneumatic Filter Assembly is a miniature inline air filter designed to remove water, dirt, rust, scale, and other contaminants from compressed air to protect downstream components such as regulators, valves, actuators, cylinders, and instrumentation. It features a 1/4-inch NPT port, a maximum operating pressure of 150 PSI, and a 22 SCFM maximum flow capacity with a 20-micron polypropylene filter element. The unit has an aluminum body and a polycarbonate bowl (model dependent), a 1 oz bowl capacity, and a manual twist drain, with tool-free bowl removal for serviceability. Part of the F504 Miniature Series (Model 504-02) from Watts FluidAir / Parker Hannifin, it is designed for in-line pneumatic system mounting and is compatible with compressed air. Common replacements include Parker Watts F504-02AH, Wilkerson M03, and Norgren Excelon Miniature Air Filter. Typical applications include compressed air preparation in manufacturing facilities, automation equipment, packaging machinery, assembly lines, process control systems, and air-operated tools.