Question on Shower Valve - 16' CCD

[RDM16CCD]

I'm thinking about modifying the shower valve in my 2005 16' CCD. In the attached photo, it's the two knobs on the floor in the shower. I got the following part numbers from the Airstream Parts Manual, but I think they are Airstream numbers:

16’ CCD WET BATH
601877-01 4 cp SHOWER VALVE W/FELT WASHER
601877-02 CP HANDSET HOSE W/WALL BRACKET

601877-03 ½’ CHROME SUPPLY ELBOW

Can anyone tell me what make this valve is, or what the letters 'cp' in the description mean? I'm hoping to find a web site and some assembly instructions, to get some clues on how to take it apart and remove it.

Thanks for any help you can give me!

Bob