Tubing coupler moldings and systems, and associated methods

A method of forming a tubing assembly of at least one tubing segment coupled to another tubing segment with a coupler join, said method comprising:

• seating ends of a first tubing segment and a second tubing segment within a mold such that a gap is formed between the first and second tubing segments, wherein the gap is aligned with a central molding region within the mold that is deeper than first and second molding regions in which the first tubing segment and the second tubing segment are seated, respectively;
• inserting a mandrel through the first tubing segment and the second tubing segment such that a portion of the mandrel extends across the gap between the first and second tubing segments;
• injecting flowable material into the gap between the first tubing segment and the second tubing segment;
• and
• curing the flowable material to form a coupler join joining the ends of the first tubing segment and the second tubing segment without extending over the exteriors of the first tubing segment and the second tubing segment;
• wherein the flowable material is selected such when the flowable material is cured it forms the coupler join having an inner diameter and an outer diameter that are substantially equal to the inner and outer diameters of the first and second tubing segments.