Which feature runs along the length of a flexible hose to indicate twisting during installation?

• A. The lay line.
• B. A color badge near the fittings.
• C. Raised texture on the hose body.
• D. A serial number printed along the hose.

Answer: (C)

Detecting twist during hose installation is essential to prevent kinking or undue stress on fittings. A raised texture that runs along the length of the hose provides a tactile cue you can feel as you route the hose. By running your fingers along this texture, you can detect any twisting or torsion and correct it before securing the connections. This continuous surface gives a steady, feel-based signal in tight or low-light areas where visual checks are harder. While some hoses use a lay line as a visual indicator of orientation, the raised texture offers a direct tactile feedback that helps ensure proper alignment throughout the entire hose run. A color badge near fittings or a serial number doesn’t indicate twist and is mainly for identification.