Minor nitpick:
Orangeburg was not popular, it was used during WWII to conserve iron for the war effort.
Before I was a mechanic, I was a licensed plumber... and yes, I did time with Roto-Rooter (I will never do that, again.)
It will depend on the area, my house & the other house on the property had Orangeburg from under the house (not kosher) to the septic tank,installed in 1957, until the pipe was replaced with ABS, clogged all the time. Production of Orangeburg pipe stopped in 1973.
Yup, a number of 50's & 60's houses in this area had that stuff, especially from septic tanks to distribution boxes. I guess it works okay for a number of years, but it seems to deteriorate over 50 or 60 years... I didn't know they stopped production in '73...
Op - and others - what I haven't heard is whether you're on a septic system or city/county utilities - is this Glug, Sizzle, muratic acid, bleach, etc., okay for septic system use, or is it going to kill off necessary bacteria??
