Most Common Causes
Main Sewer Blockage
Several drains back up together, often the lowest ones first, like a tub or shower.
Tree Roots
Common in established Dallas neighborhoods with mature trees and older clay pipe. Roots enter through joints and cracks, then grow.
Grease
Kitchen grease hardens as it cools, narrowing the line a little more each time.
Damaged Sewer Pipe
Expansive clay soil can shift the line, crack joints, and create low spots that collect waste.
Foreign Objects
Wipes (even “flushable” ones), paper towels, and toys are a common avoidable cause.
What Can You Check Yourself?
- Check whether the problem is one drain or many.
- Watch for water rising in the tub when the toilet is flushed or the washer drains.
- Look at the outdoor cleanout cap for standing water.
- Think about timing: after heavy laundry, after rain, or randomly?
- Skip chemical drain cleaners, which can damage pipes and rarely fix the cause.
When Should You Call a Plumber?
Call a plumber if backups recur, involve several fixtures, or bring sewage into the home. Stop using water until the line is cleared if sewage is coming up.
Could It Be the Main Sewer Line?
If one drain keeps backing up, it is usually a local clog. If several drains back up together, the main sewer line is likely blocked, often by grease, wipes, roots, or a sagging pipe. Gurgling toilets and sewer odors are additional clues.
How Is the Problem Diagnosed?
The plumber clears the line, then runs a camera to identify roots, bellies, cracks, or buildup and gives you repair options. Ask for a copy of the footage; it helps if you want a second opinion.
Related Services
Backups that keep coming back need a look inside the line.