check valves

[Blacksdieselhp]

Not trying to step on any toes, but I am putting together a fuel system for my personal truck that is similar to the RASP. I am going to run a bypass regulator where they run an in line 12 psi spring loaded regulator for the return. But on the supply for the electric pump I am going to use the same idea as the rasp and use a one way check valve to keep fuel from running back through the electric pump. The one they use has a 4 psi cracking pressure I think and most valves that are similar to this one has a cracking pressure of 1 psi. I don't see where this would make a difference, but thought I'd ask. Thanks in advance for your help.