wakeboard1026
New
Well of course after i posted, I did find a parts explosion to the Campbell Hausfeld DC040500 model (which @DanaHunt thought was Diaphragm), and it is most definitely a Piston pump, and NOT a Diaphragm pump, if anyone is curious. Surely the Kobalt is the same concept. I guess that means that even the professional models are as well. Looks like I will now search for a very good filter, and perform a long run-in process on whichever compressor I end up choosing.
https://www.campbellhausfeld.com/files/attachments/390/DC040500-manual.pdf.pdf
https://www.campbellhausfeld.com/files/attachments/390/DC040500-manual.pdf.pdf