Do you have check valves with Certa Lok® pipe connections?
Yes, Boshart can supply four types of Flomatic check valves with Certa-Lok® connections. Certa-Lok® is a registered trademark with Westlake Pipe & Fitting (patent number: 9,032,992B2).

These check valves are the VFD (variable frequency drive) type and are available in ductile iron and 316 stainless steel in sizes 2” through 8”, as detailed below. The connection is a restrained joint PVC pipe connection.

https://www.flomatic.com/valves/check-valves/ductile-iron/80dimclvfd/

https://www.flomatic.com/valves/check-valves/stainless-steel/80s6mclvfd/

https://www.flomatic.com/valves/check-valves/ductile-iron/80dimclvfd/

https://www.flomatic.com/valves/check-valves/stainless-steel/80s6clvfd/
Additional Resources:
https://support.boshart.com/what-is-the-function-of-a-check-valve-in-a-well-water-system
https://support.boshart.com/how-to-install-a-submersible-pump-check-valve
https://support.boshart.com/do-i-need-more-than-one-check-valve-in-a-submersible-pump-system
https://support.boshart.com/what-is-the-weight-holding-capacity-for-flomatic-check-valves
https://www.westlakepipe.com/sites/default/files/media/MU-BR-001-US-EN-0923.1_Municipal-Brochure.pdf