Fix it
Why do my drains keep backing up?
One slow fixture is a local clog. Several fixtures backing up together — especially at the bottom floor of the house — means the main sewer line is restricted, and everything upstream shares one exit.
What it usually is
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Tree roots in the main line
Roots find joints in older clay and cast iron lines, then grow into a net that catches everything. Backups that recur seasonally, or improve after cabling and return, fit roots.
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Grease and waste narrowing the main
A decades-old accumulation narrows the bore; the house limps along until one day it does not. Slow everything, worst at the bottom floor, is the pattern.
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A bellied or broken pipe section
Settling can sag a buried run so solids pool in the low spot. Cabling clears it briefly; the geometry refills it. Only a camera makes this visible.
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Flushed wipes and non-dispersibles
"Flushable" wipes do not break down; they mat together at any rough spot and seed a clog that regular paper would have passed.
Safety first: Sewage coming up at a floor drain or tub is a stop-everything moment: no laundry, no flushing, no showers until the line is opened.
What you can check yourself
Map the behavior: which fixtures, which floor, does the bottom-floor drain gurgle when an upper one empties? Locate your cleanout cap outside and check whether it stands full — a full cleanout confirms the main. Stop running water immediately when a backup starts; every gallon has nowhere to go but a floor drain.
When it’s a job for a pro
Main-line work is machine cabling or hydro-jetting through the cleanout, and a camera pass afterward tells you WHY it keeps happening — roots, belly, or break — which is the difference between a maintenance plan and an excavation quote.
Main-line cabling typically runs $250 to $600; hydro-jetting $400 to $900; a camera inspection $150 to $350. Root-cut maintenance on a known line is far cheaper than reactive weekend calls.
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