Trust me don't go thru the throne. Use thecleanout on the line going
out to the street that is what it is for . Also if you have gunk it is
not running fast enough .- Hide quoted text -

The toilet is flushing slow, even holding handle down doesn't get a
complete empty. I plunged and snaked and found no blockage at the
toilet.

The line is 20 feet. Picture a straight line in back yard, right to
left. At the right is some kind of pipe at ground level outside and
no visible way to open it. 12 feet left is the tub, 3 feet is the
kitchen bath sinks back to back, and 3 feet more is the toilet.
Between the sinks and toilet, under the kitchen sink is the clean out
valve hectongal (something to turn with a pipe wrench).

I ran kitchen water but it might miss the problem if it is between the
toilet and the sink. The only thing running slow is the toilet. The
tub and sink are working fine. I think I have isolated the problem.

The solution is opening the clean out valve with a pipe wrench under
the sink which is before the sink drain but after the toilet (note to
self: buy pipe wrench) and snake. It is isolated so I may not need to
go to the expense to renting a machine.

Any other suggestions? Should I post pictures