Filter principle Pure physical filtration, precision copper filter, independent filter cover, effectively filter moisture to achieve water and oil separation. The bottom is equipped with a manual check valve forevacuate collected pollutants. AccessoriesUsed to connect to the inlet of air tools to filter impurities and moisture in the air. Standard BSP thread means this fits perfectly between most spray guns and compressorsof air, and will work with high powered air tools. Maximum pressure: 9.9 kg/cm2. Widely UsedThis compressed air filter has a wide range of applications, and meets or exceeds the original factory specifications, can be directly replaced to meet your various needs. Universal input and output design1" or 4" NPT easily connects air line to air tools and spray guns. Maintenance To clean or replace the filter element, simply remove the filter element and blow it from the inside out with an air gun. Wipe the clear PC outer cup with a clean cloth. Do not useof chemicals that will damage the hardware of the PC.