Requirement for a straight pipe runs before/after CSV?

[stvnwhite]

Getting ready to install a CSV1A and I was wondering if there is any requirement for straight piping before and/or after the valve before going into the pressure tank?   Can I just thread a 90 Elbow directly onto the CSV1A input side or should there be a length of straight piping to reduce turbulence and pressure variations?   Likewise for the exit side going into the pressure tank?

Thanks

[Cary Austin]

There is no straight pipe requirement.  An elbow on either or both ends is fine.