Abstract: An apparatus removing air from pressurized gas, including a pressure housing removably securable to a connection cap, a removable filter housing in the housing with moisture removing material in the filter housing, and an external indicator indicating that the apparatus is not removing at least some moisture. The cap includes an air flow exit for air which has passed through the filter housing. The indicator is on the cap and includes visible material which changes color when moisture is present. An aspirator tube diverts some air flow from the cap air flow exit into the indicator visible color changing material. The filter housing is transparent or translucent and includes oil removing material and a sintered disk before the moisture removing material.

Abstract: An apparatus removing air from pressurized gas, including a pressure housing removably securable to a connection cap, a removable filter housing in the housing with moisture removing material in the filter housing, and an external indicator indicating that the apparatus is not removing at least some moisture. The cap includes an air flow exit for air which has passed through the filter housing. The indicator is on the cap and includes visible material which changes color when moisture is present. An aspirator tube diverts some air flow from the cap air flow exit into the indicator visible color changing material. The filter housing is transparent or translucent and includes oil removing material and a sintered disk before the moisture removing material.