Gackup filter housing
These kind of filter housings are used as inline fitlers for gases or liquids with only little contamination. They are also used as backup filters in case contaminations can occurr only as an exception, e.g. when the main filter is defective of when a system breakdown generates particles which normally are not there. Backup filters can be mounted in a very space-saving manner directly in the pipe/hose line.
Anschluss Filterkopf NPT-i