Abstract: There is disclosed a method of connecting tubes using a connector which comprises a body 41, through which is positioned a screw 43 having a head 44 and a threaded stem 45. A resiliently deformable member 413 is positioned on the threaded stem and a washer 46 is positioned on the threaded stem 45 the opposite side of the resiliently deformable member 413 from the body 41. A second washer 412 is positioned between the resiliently deformable member 413 and the body 41. In the method of the present invention the connector is inserted into a tube and a screwdriver is inserted into a groove in the head 44 of the screw 43. The screw 43 is thus rotated so that the washer 46 is threaded along the threaded stem 45 towards the body 41, thus compressing the resiliently deformable member 413 so that the resiliently deformable member 413 bulges outwardly and thus establishes a friction grip on the inner surface of the tube, thus securing the connector in relation to the tube.