Apparatus for removing oil and moisture from a gas

An apparatus for e oving moisture and oil from a gas, comprising:

• an elongate housing removably securable to a connection cap, said cap having a gas inlet and a gas outlet;
• a removable filter housing in said elongate housing, said filter housing having
• an outlet removably connectable to said connection cap to connect said filter outlet to said connection cap gas outlet, and
• an inlet to said connection cap gas inlet;
• oil removing material in said filter housing at said filter housing inlet,
• moisture removing material in said filter housing;
• a sintered disk between said oil removing material and said moisture removing material;
• and
• an indicator indicating that the apparatus is not removing at least some moisture, including
• a clear or translucent indicator housing secured to said connection cap,
• an indicator material in said indicator housing, said indicator material being adapted to change color when moisture is present in said indicator material to provide a visual indication on said connection cap when moisture is getting past the moisture removing material in said filter housing, and
• an indicator inlet and an indicator outlet through said connection cap connecting said connection cap gas outlet to said indicator housing, said indicator inlet including an aspirator tube extending into the path of gas flowing through said connection cap gas outlet,
• whereby gas flows from said connection cap gas inlet into said elongate housing around said filter housing to said filter housing inlet then through said filter using to said filter housing outlet to and out said connection cap gas outlet, with a portion of said gas in said connection cap gas outlet flowing into said indicator housing via said indicator inlet aspirator tube;
• and
• wherein said filter housing is translucent at least sufficiently to externally see visual indication that either or both of said moisture removing material and oil removing material can no longer removing oil or moisture.