What is the cracking pressure of the 17PCV check and 17PFV foot valves?

The 1/2" through 2" PVC poppet type check valves (17PCV series) and PVC foot valves (17PFV series) have a cracking pressure equal to, or less than 0.5 PSI.

Additional Resources:

https://support.boshart.com/what-is-the-maximum-working-pressure-of-the-17pcv-check-and-17pfv-foot-valves

https://support.boshart.com/strength-/-pressure-derating-factors-increased-operating-temperatures-thermoplastic-piping