new to me gas coupling

[Jim Robinson]

This looked like a non threaded gas line coupling. Sort of like a Shark Bite. I couldn't read any of the writing. Have any of you seen these?

[Dom D'Agostino]

I've seen them on some LPG installs. they're press-fit connectors.
I didn't research their limitations or other specifics.

https://www.viega.us/en/products/innovations/viega-megapress.html

[Jerry Peck]

https://www.supplyhouse.com/Viega-25201-1-2-MegaPressG-90-Elbow?gclid=Cj0KCQiA34OBBhCcARIsAG32uvMWQ6NaaOX6lk pwjsW8EI8IPHQVdGSzXMJdkXD7b-BEJbrbvDQ4cxgaAqWREALw_wcB

Do some research on its listing and what is required by code.

All I did was a Google search and found that, and that the page said "application gas".

[Ken Amelin]

This looked like a non threaded gas line coupling. Sort of like a Shark Bite. I couldn't read any of the writing. Have any of you seen these?

I've seen more and more of this. It requires special tooling and the fittings are pretty expensive.
My plumber contact tells me it saves them a lot of time on the job.

[Jerry Peck]

I looked at the information, according to the information on their pages, the fittings are listed, and their listing matches what the IRC requires. On my phone, so I'm not typing all the code information.

The fittings are press fit, however, that is not press fittings on like Sharkbite fittings for plumbing/water use - those require a tool which press fits (for lack of a better descriptive word 'crimps') the fittings tightly to and around the pipe.

Those would be one time use fittings and not removable (without damaging the fitting and pipe).