I'll go measure it, my fear is that you're right, and I have to work backwards raising the slope of the pipe from there all the way back under the master.
I've had to clear a clog in my main line four or five times in the past two months.
I've run a 50ft snake up and down the line.
I've bought a 50ft power unit (this one) and ran it down the line.
I now fear that the actual setup is improper.
The issue happens where 3 rooms connect to the main...
