A plumbing fitting, commonly composed of a ferrous alloy, incorporates a perpendicular branch with a capped opening. This configuration permits the introduction of testing equipment into a drainage system, verifying integrity and identifying potential leaks prior to final system commissioning. For example, during a hydrostatic test of a building’s waste piping, water is introduced via this fitting to observe pressure retention.
The inclusion of this component streamlines diagnostic procedures, reducing the need for extensive disassembly and minimizing disruption. Its robust construction and material properties ensure resilience against corrosion and mechanical stress, contributing to the longevity and reliability of the overall plumbing infrastructure. Historically, its use reflects a move toward preventative measures and improved quality control within building construction and maintenance practices.