Expandable plug and pressure tool for use in metallic wick pore size testing

A device for performing pore size testing on a mesh wick, the device comprising:

• a first tube comprising a first end and a second end;
• a second tube inserted through the first tube, wherein the first end and the second end are both attached and sealed to an exterior surface of the second tube, and wherein the exterior surface of the second tube and an internal surface of the first tube cooperatively define an internal cavity therebetween;
• an inlet tube extending from the first tube, wherein the inlet tube connects to the internal cavity to allow a fluid to enter the internal cavity through the inlet tube;
• and
• an expandable bladder positioned around a portion of the first tube, the expandable bladder comprising a third end and a fourth end, wherein the third end and fourth end are both attached and sealed to an exterior surface of the first tube, and wherein the portion of the first tube is configured to allow the fluid to exit the internal cavity through the exterior surface of the first tube into the expandable bladder causing the expandable bladder to expand.