Tough one

[fixitright]

What am I missing? (big house)

Owner pulled 2nd story toilet, water in line, overflowed into tub. Master bath uses same stack but not back to back.
Ran toilet auger into master toilet.

All other lines flow. Multiple stacks, other toilets work, no overflow of floor drains.

Stack that plugged toilet is on sounds empty (ABS). Kitchen line runs into it but it flows.

Ran a 1/2" cable 80', no results. Enough to get to main.

Is there a way water could be kept up there?

[AssTyme]

Probably an oatmeal blockage

Work it...

[fixitright]

The stack is empty, the kitchen runs into same line and flows.

The toilet has not been used much and backed up into the tub. I ran the tub.

Is there any way it could hold water?

Camera Monday if I can get through the snow.

[AssTyme]

If the toilet is flushing into the tub there must be a blockage in the main, no?

[fixitright]

Common sense would say yes.

I ran it twice down the line, stack is empty.

Just thinking if there was something weird about how it hooks up to the
other upstairs toilet that would do this.

Camera Monday.

Let you know

[AssTyme]

Probably full of oatmeal in the horizontal run, try sectional cable to spin it out.

[fixitright]

Wait till this storm runs your way.

[AssTyme]

What does that have to do with the oatmeal in the main line?

[Cable or root]

Bad grade? Maybe it runs to a different stack than expected. Shopvac it out then camera. Let us know

[fixitright]

What does that have to do with the oatmeal in the main line?

It's a really impressive April storm.

And I can. LOL