Sludge removal
I had a similar problem when I bought my 27. Followed Peggy's advice and put White Vinegar through the lines, into the holding tank. Followed that with minimum water. Let it sit (while I sailed for two afternoons)and it worked around. Then, I filled the holding tank with water (hose, not lake). Took her to the pump out and it was amazing!! Then, while at pump out, I flushed with water and white vinegar (1 Gallon at a time) two more times - more solids pumped out. Then, I brought her back to our slip, added my normal blue water and have had NO ISSUES since. Each pump out, I do the White Vinegar trick prior to pump out - be sute to run it thru the lines from the head, as this helps keep the lines from creating odors, too. Peggy knows her stuff, and I can tell you that we (and our guests) appreciate that!!!Good Winds,JAY