What is the term for the pipe measurement known as "face to face"?

The term "face to face" refers to the measurement taken from the face of one end of a pipe fitting or pipe to the face of the other end, typically used to determine the proper length of a component in a plumbing system. This measurement is crucial as it ensures that fittings and pipes align correctly when installed in a plumbing system, preventing any gaps or misalignments that could lead to leaks or other issues.

In plumbing and piping installations, understanding the length is vital when planning and constructing systems, as it directly impacts the overall assembly and functionality of the piping network. Accurate measurements are essential for ensuring that pipes fit together seamlessly and function as intended.