Patent ID: 7988204

Claim:
A pipe fitting for connecting between a metal piece of plumbing and a polymer piece of plumbing, the pipe fitting comprising: a main body having a tubular first end defining a first opening and an opposite tubular second end defining a second opening spaced from the first opening, the main body in part defining a passage extending through the pipe fitting from the first opening to the second opening; a tubular one-piece polymeric body molded within the first end of the main body, the polymeric body having a radially outer surface molded against a radially inner surface of the main body and having a radially inner surface that in part defines the passage and that is for mating with a polymer piece of plumbing; wherein the main body defines an aperture extending from the radially inner surface of the main body to a radially outer surface thereof, through which polymer material is injected for molding the polymeric body within the main body, and wherein a portion of the polymeric body extends into the aperture; and the polymeric body has a shorter length than the main body such that the main body has an end part that extends beyond the polymeric body and defines an inner surface and an outer surface that are both exposed, said inner surface surrounding the second opening; one of said inner surface and said outer surface of said main body comprising at least one spiral thread for being mated to a spiral thread of a metal piece of plumbing.