Additional information and details on mechanical couplings are provided in Chapter 9 of the Plastic Pipe Institute (PPI) Handbook of Polyethylene Pipe.

Transition Fittings

Other methods are available that allow joining of PE to metal. Transition fittings are available which are pre-assembled at the manufacturer's facility, and normally pressure tight, with pull-out capability greater than that of the PE pipe. Transition fittings are available in all common pipe sizes, with a short segment of PE pipe for joining to the PE pipe section. The metal end is available with a bevel for butt welding, with male or female pipe threads, or grooved for a Victaulic style, or flanged.

Transition Fitting: PE Pipe to Steel Pipe and PE Pipe to PVC