Compressor problem

[Jimbabwe]

I've got air leaking out of the white plastic filter(?) on one of the Firestone compressors that are part of my Ridetech setup. It's audible, and cupping the filter quiets the noise. If this is an intake into the compressor and not an airline fitting would you say that there is a problem with a reed valve or check valve inside that would cause this problem? The system is relatively new. I haven't even driven the truck yet since installing all the Porterbuilt suspension.
Thanks.