Multiple threaded connector for filter

An adapter for a filter assembly, comprising:

• a first adapter end;
• a second adapter end disposed axially away from the first adapter end;
• an annular portion disposed between the first adapter end and the second adapter end, the annular portion comprising at least one opening formed in the annular portion, the at least one opening configured to allow fluid therethrough;
• a first axial wall that extends from the annular portion axially towards the first adapter end, the first axial wall comprising a first external surface, the first external surface comprising a first coupling member configured to engage a second coupling member on a filter head so as to removably couple the adapter and the filter head;
• and
• a second axial wall that extends from the annular portion axially towards the second adapter end, the second axial wall comprising a third coupling member configured to engage a fourth coupling member on a filter cartridge so as to removably couple the adapter and the filter cartridge,
• wherein the first axial wall comprises a first internal surface and the first external surface, the first internal surface parallel to the first external surface, and the second axial wall comprises a second internal surface and a second external surface, the second internal surface parallel to the second external surface, and
• wherein the first external surface of the first axial wall comprises the first coupling member and the second internal surface of the second axial wall comprises the third coupling member.

An adapter for a filter assembly, comprising:

• a first adapter end;
• a second adapter end disposed axially away from the first adapter end;
• an annular portion disposed between the first adapter end and the second adapter end, the annular portion comprising at least one opening formed in the annular portion, the at least one opening configured to allow fluid therethrough;
• an adapter sleeve that extends axially from the annular portion toward the first adapter end, the adapter sleeve comprising a first sealing surface along an external surface of the adapter sleeve, the first sealing surface configured to form a first seal with a first surface of a filter head to prevent fluid leakage from the filter head;
• a first axial wall that extends from the annular portion axially towards the first adapter end, the first axial wall comprising a first coupling member configured to engage a second coupling member on a filter head so as to removably couple the adapter and the filter head;
• and
• a second axial wall that extends from the annular portion axially towards the second adapter end, the second axial wall comprising a third coupling member configured to engage a fourth coupling member on a nutplate so as to removably couple the adapter and the nutplate;
• wherein the annular portion further comprises a second sealing surface facing the first adapter end, the second sealing surface configured to form a second seal with a second surface of the filter head to prevent fluid leakage from the filter head.

An adapter for a filter assembly, comprising:

• a first adapter end;
• a second adapter end disposed axially away from the first adapter end;
• an annular portion disposed between the first adapter end and the second adapter end, the annular portion comprising at least one opening formed in the annular portion, the at least one opening configured to allow fluid therethrough;
• a first axial wall that extends from the annular portion axially towards the first adapter end, the first axial wall comprising a first coupling member configured to engage a second coupling member on a filter head so as to removably couple the adapter and the filter head;
• a second axial wall that extends from the annular portion axially towards the second adapter end, the second axial wall comprising a third coupling member configured to engage a fourth coupling member on a filter cartridge so as to removably couple the adapter and the filter cartridge;
• and
• an adapter sleeve that extends axially from the annular portion toward the first adapter end, a flow passage formed within the adapter sleeve configured to allow fluid therethrough,
• wherein the first axial wall comprises a first internal surface and a first external surface, the first internal surface parallel to the first external surface, and the second axial wall comprises a second internal surface and a second external surface, the second internal surface parallel to the second external surface, and
• wherein the first external surface of the first axial wall comprises the first coupling member and the second internal surface of the second axial wall comprises the third coupling member.