Abstract: A stabilizing collar which is adapted to fasten to a drain pipe for stabilizing a drain and a stabilized drain and pipe assembly including drain having a receptacle body wherein the collar is adapted to fasten to the pipe at a location below the floor surface. The drain includes a receptacle including a plurality of downwardly opening bosses and the collar includes a plurality of bosses and at least one support member is adapted to be received within the bosses to stabilize the receptacle body relative to the stabilizing collar and the floor. Engagement members cooperate with adjustment members to adjust the diameter of the collar with respect to the pipe. The receptacle body is attached to the pipe and the support members are adjusted so that they contact the receptacle body and therefore provide support to keep the receptacle body at the same slope as the floor level.