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1. A compression collar for reinforcing an interference fit between an end of a pipe and a fitting, the compression collar comprising: an injection molded tubular body formed of a cold-expansion material, the tubular body having a pipe insertion end, the pipe insertion end including an insertion opening defined therein, a stop end opposite the pipe insertion end, the stop end including a stop opening defined therein, a central axis extending axially through the pipe insertion end and the stop end, a radially inner surface defining a bore extending along the central axis through the tubular body, the bore in fluid communication with the insertion opening and the stop opening, a radially outer surface spaced radially outwardly from the radially inner surface, at least one positioning tab positioned adjacent the stop end and extending radially inwardly toward the central axis, wherein the compression collar is structurally configured such that the compression collar is formed without and includes no knitlines, wherein each of the radially inner surface and the radially outer surface has a substantially constant radius with respect to the central axis between the pipe insertion end and the stop end such that the compression collar is a straight member.
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