Bill & Danny you guys were dead right.
We are mid way in cleaning the copper tube toilet outflow to the holding tank and it was completely blocked. What a hell of a job!!! 5 hours into it and we have bored through just half of the muck in the copper tube!!!
Our 25mm and 38mm toilet outlet hoses were completely clear however we were previously not aware of the 30" length of the copper tube inside the holding tanks, and therefore the need to also bore through and clear out all the muck in this very difficult to get to copper tube.
We have a new macerator pump on it's way here tomorrow, but are not at all surprised that nothing was moving out the bowl as no amount of power would have pushed anything at all through such a badly blocked copper tube.
To those of you who have not done this job before...... take good heed of Danny's advice .... and flush for at least a few minutes daily as I can assure you that this is one very dirty, smelly, awkward job that you don't want to do at all unless you absolutely have to. Fortunately in our case now this will not be a problem again for hopefully at least another 10 years.
Thanks again and Happy sailing
Colin & Lauren Streeter
Island Pearl II, SM #332