iSpring spin-down filter pressure drop?

[Seiyafan]

For those of you who have the iSpring spin-down filter in your system and happen to have pressure gauges, what's the pressure drop when it's clean? I can only find the data published by Rusco and their 1'' has about 1.7 psi drop at 5 GPM. I presume the iSpring is about the same since the design is similar but just want to be certain from those of you who can tell from pressure gauge reading. Thanks!