Patent ID: 7980602

Claim:
An assembly comprising a pipe fitting, the pipe fitting comprising: a high-density polyethylene (HDPE) pipe body having a circular opening; a ring-shaped polyvinyl chloride (PVC) insert positioned within the opening such that an outer surface of the PVC insert is in contact with an inner surface of the opening of the HDPE pipe body, wherein an inner surface of the PVC insert is threaded; and a gapless compression ring installed over an outer surface of the HDPE pipe body at the opening of the HDPE pipe body, installation of the compression ring causing the compression ring to exert inward radial force on the HDPE pipe body, the inward radial force on the HDPE pipe body compressing the HDPE pipe body inward such that the inner surface of the opening of the HDPE pipe body exerts inward radial force on the outer surface of the PVC insert, thereby creating a tight fit between the HDPE pipe body and the PVC insert.