Toilet to holding tank hose

I discovered some new information about my holding tank and hose runs today by reading the Owners Manual. Any possibility you may find useful info in yours?
 
I discovered some new information about my holding tank and hose runs today by reading the Owners Manual. Any possibility you may find useful info in yours?
It’s the first place I went to….all extremely vague…but the run is obvious….just that it’s inaccessible for its two meter length
 
So I disconnected the hose from the back of the toilet….and these are some of the rocks that fell out

Back to the workshop to make some 25 mm bungs to seal up the hose before I entomb it forever
 
My theory is that this is the build up on the inner walls of the hose....which is normal for a toilet hose....but when I used an aggressive mix of strong vinegar and acid.....it dislodged it and put the stones in circulation. So it would have eventually blocked....and I’m glad I am changing it.
Remember....this is what the insides of your kidneys look like
 
Ok..,so I cut a couple of pieces from a 25mm pvc pipe and filled them with mastic..,hopefully by tomorrow they will be suitable bungs
 
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