Clean and Secure
Clean the inside and outside of the pipe to be joined by wiping with a clean lint-free cloth. Remove all foreign matter. Extend sufficient pipe through the inner jaws to allow the facer to cut and clean up the surface (see equipment manufacturer's manual for recommendations). Clamp the components in the machine. Check alignment of the ends and adjust as needed.
Ref: Polyethylene Piping Systems Field Manual for Municipal Water (Irving, TX: The Plastics Pipe Institute, 2010)