This coupling with stop is designed for joining large-diameter copper tubing in potable water, heating, and fire protection systems. This 2-1/2 in copper fitting features the patented smart connect technology, allowing for quick identification of unpressed connections during pressure testing. The cold-press connection method eliminates the need for soldering or brazing, significantly reducing installation time and labor costs. Durable copper construction ensures a long-lasting, leak-free connection in residential, commercial, and industrial applications.