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Originally Posted by masraum
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1st pic - small pipe has plenty of pitch. No hangers on the second one, could it have dropped and is now flat or backpitched?
2nd pic - The cap on the end is a cleanout cap. You can unscrew it, run water and see if it is flowing, and snake it from there if the clog is after the cleanout. I don't like the rubber fernco repair above, again, perhaps the pipe sitting on dirt has settled and no longer has enough pitch.