Dry-Fit and Mark Pipe Insertion Depth

What happens here

Before making a permanent connection, the presenter dry-fits a copper pipe section with a press fitting onto a connection point, which in this case is a water heater. This allows for precise measurement and alignment. Once the fitting is in its intended position, a permanent marker (Sharpie) is used to clearly mark the pipe at the edge of the fitting. This mark serves as a visual guide to ensure the pipe is fully inserted into the fitting, which is critical for a secure and leak-free press connection. This marking helps prevent under-insertion, which could lead to leaks.