Landscaping License Practice Test

Which PVC has the highest pressure rating?

1. Class 200

2. Class 315

3. Schedule 40

4. Schedule 80

The correct answer is: Class 315

The answer indicates that Class 315 PVC has the highest pressure rating compared to the other options listed. In the realm of PVC pipe classifications, the pressure rating of a pipe is an important factor as it determines the amount of internal pressure the pipe can withstand safely. Class 200 and Class 315 represent two distinct classes of PVC; Class 315 is designed for higher pressure applications, reflecting its construction and specifications that allow it to handle greater internal pressures. Meanwhile, Schedule 40 and Schedule 80 PVC pipes are categorized by their wall thickness, with Schedule 80 having a thicker wall than Schedule 40. This thicker wall in Schedule 80 does give it a higher pressure rating than Schedule 40, but still does not exceed that of Class 315. This relationship among the classifications highlights how the specific design and intended use of the pipe influence its pressure rating, showcasing that Class 315 is built for applications requiring even stronger and more durable materials capable of withstanding higher pressures.