PVC force mains shall be rated at a minimum operating pressure of how many psi?

• A. 150 psi
• B. 100 psi
• C. 200 psi
• D. 250 psi

Answer: (A)

When selecting PVC pipe for a force main, you’re choosing a pipe that can safely carry the pressure from the pump and the weight of the sewer column, including any surge when the pump starts or stops. The standard minimum operating pressure for PVC force mains is 150 psi. This rating ensures the pipe can handle typical static head plus surge pressures without failing.

Smaller ratings like 100 psi would be insufficient for many pumping scenarios and surges, while ratings of 200 psi or 250 psi are higher than the required minimum and aren’t needed unless the specific installation demands it.