I am accustomed to seeing flexible connectors at the POC of a compressor or vacuum pump package here in California.

NFPA requires them at the compressors/pumps themselves, but doesn't state a requirement at POC.  

A new Beacon Medaes system is being installed without the flex connectors, and I wanted to ask if:

A) Did I miss a requirement?

B) Is it a seismic (California) requirement?

C) Is it a Beacon Medaes requirement? (I have seen them supply flex connectors loose.)

OR

D) Just because I am used to seeing something doesn't make it a requirement....

Thanks.