The 28RK in the NADA RV Bluebook is shown as a 2003 model....not a 2004 model.
2003 Dutchmen Classic Fifth Wheel Series M-28RK-H5...I couldn't find the holding tank specs anywhere. Look inside the cupboard doors inside the RV, sometime the capacities are listed there. Or call Thor/Dutchmen RV cusomeer service with your VIN number and ask them!
Phone: (574)537-0600...Toll Free - 866-869-1110
My posts shouldn't be taken for factual data, and are purely fictional, for entertainment purposes, should not be constituted as related to scientific, technical, engineering, legal, religious, spiritual, or practical advice. After all it's FREE! Amen. :W