Which PVC has the highest pressure rating?

The option with the highest pressure rating is Class 315 PVC. Class 315 denotes a specific type of PVC pipe that is capable of handling higher pressure applications compared to other standard schedules. The numerical designation reflects the pipe's pressure rating in pounds per square inch (psi), thereby indicating its thickness and strength relative to the pressure it can withstand.

In contrast, Schedule 40 and Schedule 80 refer to different wall thicknesses and pressure ratings, with Schedule 80 having a higher rating than Schedule 40, but both are typically lower than Class 315. Class 160 also has a lower pressure rating compared to Class 315, which further emphasizes the superior capability of Class 315 in high-pressure scenarios.

For applications that require resistance to high pressure, Class 315 PVC is preferred, as its design enables it to perform optimally under such conditions, making it a crucial choice in various demanding plumbing and industrial situations.