Clogged yellow head on 7900

I just started running a small print studio on the campus of Montclair State University. We recently installed your DN inks on our 9800 and it is doing fine. We now have a blockage in the yellow head on our 7900. Is in possible to install a single cartridge filled with PiezoFlush to clean that head only?

Yes. Put the PF in the 7900 and do a CL4 cleaning on the Yellow channel pair.

That being said, the DN curves never use the 7th (Yellow) shade so you are fine to keep printing DNs even with the blocked channel.