How do I install an industrial spool pitless unit quick connect flange?
The installation instruction for the Series 2100 MEGAFLANGE® Restrained Flange are copied below.

Additional Resources:
https://support.boshart.com/what-are-the-specifications-for-spool-pitless-unit-quick-connect-flange
https://ebaa.com/products/flange
https://ebaa.com/files/pdf/brochures/Brochure.2100.pdf

Installation Video: https://ebaa.com/products/flange
For information on the pitless units see the "Municipal and Industrial Pitless Well Systems Booklet."