Lead-free Brass Press Male Union MPT X Press
https://www.fadavalve.com/product/press-fit-brass-unions/leadfree-brass-press-male-union-mpt-x-press.html
The Fada Press System Eco Brass male union features an inboard EPDM O-ring. Simply applying pressure from a pressing tool tightens the O-ring onto the tube, ensuring a clean, watertight seal in seconds, with no flame, solder or flux. The male union has a press connection and male NPT thread. The fitting provides a method for adapting a press connection to a threaded connection.

In addiction to its inherent qualities of beauty, durability and low maintenance, copper's reusability makes it an ideal application in sustainable projects.

The small diameter fittings 1/2"-2" are made from naturally lead free brass. EPDM O-ring are pre-installed and lubricated with ANSI/NSF 61 listed silicone oil.