is easily removable because of the termination of downwardly urged force or pressure upon the upper face of the disk 121 the basket b may then either be withdrawn from or introduced into the interior of the apparatus 100 as required now referring to fig6 a contoured shoulder 119 is defined interiorally on lock nut 113 and may be a continuing profile of the inner most grooveway 116 extending from the inner most grooveway wall 117 when the lock nut 113 is desired to be secured relative to the lower face or bottom side 111 of the lip 105 the shoulder 119 will come into contact with a lower portion of the taper 112 such that resistance to movements in one direction of the lock nut 113 is provided further securing the lock nut 113 in place when it is desired to incorporate the outlet assembly 100 into the sink s the elongated cylindrical sleeve 101 is placed into the receiving profile 103 subsequent to placement within the profile rp of a gasket g the lower end 103 of the sleeve 101 passes through the opening in the receiving profile rp the taper 112 assists in centering the apparatus 100 within the receiving profile rp thereafter a gasket g 1 may be placed.