1" Propress Coupling W/Stop. Hard Copper Pipe is generally used for supply of hot and cold water in both commercial and residential applications. Rigid or hard copper is always soldered, crimped, or pressed as the form of connection. Copper offers a high level of resistance to corrosion, and needs fittings to get around bends and obstacles. Copper fittings also range in application. ProPress Fittings require only a smooth and clean connection area for the best press. ProPress is much faster than the general heat applications. This 1" ProPress Coupling W/Stop is a typical copper coupling designed for the connection of two water lines. The stop allows the user to insert the pipe into fitting for a reliable press.