NCCER Plumbing Level 2 Practice Exam

Fiberglass pipe insulation is commonly manufactured in preslit lengths, typically around 3 feet in length. This format is particularly advantageous for ease of handling and application. The preslit design allows for quick installation on various pipe sizes, as it can easily be fitted around existing piping without needing extensive cutting or preparation.

The choice of 3-foot lengths strikes a balance between usability and efficiency, making it manageable for installers to work with during jobs. This format also helps minimize waste, as it can be easily fitted together or trimmed as needed, ensuring that the insulation conforms well to the pipe.

Although other forms of fiberglass insulation may exist, such as continuous rolls or custom cuts, the preslit 3-foot lengths are standard in the industry, primarily for their practicality and convenience in typical plumbing installations.