Immediate Action: Do This Now
- Stop all water use in the house: no flushing, laundry, showers, or dishwasher.
- Check the lowest drains, tub, shower, and floor drains, for rising water.
- If you know where your outdoor sewer cleanout is, check whether water is standing in it, but do not open it if it is under pressure.
- Request emergency help and list which fixtures are affected.
What Causes Multiple Drains Backing Up?
All of a home’s drains feed into one main line, so a single blockage there affects everything.
Grease, wipes, and debris
Build up in the main line over time.
Tree roots
Common in older Dallas neighborhoods with mature trees.
Pipe sag or break
Clay soil movement can create bellies or cracks.
Old clay or cast-iron pipe
Common in homes built before the 1970s.
How Serious Is Multiple Drains Backing Up?
Multiple backed-up drains usually escalate to sewage in the house if water use continues. Treat it as urgent and stop using water.
What Should You Do Before the Plumber Arrives?
- Keep water use at zero until the line is cleared.
- Skip chemical drain cleaners.
- Keep children and pets away from any wastewater.
Can It Be Repaired or Does It Need Replacement?
The main line is cleared, then a camera inspection shows the cause. Roots may be cut and the line hydro jetted; damaged sections may need sewer line repair.
How Much Can Emergency Main Line Repair Cost?
Emergency and after-hours visits typically cost more than scheduled work, and the total depends on what failed and how hard it is to reach. We do not publish a price for this specific repair. See emergency plumber cost, drain cleaning cost, sewer line repair cost for published ranges with linked sources, and ask before work starts whether there is a dispatch or after-hours fee and whether it is credited toward the repair.
Related Problems
FAQs
Why is the tub backing up when I flush?
Water from the toilet cannot get past a main line blockage and comes up the lowest drain, usually the tub.
Can I use the plunger?
Plunging one fixture will not clear a main line and can push water out of another drain.
Shut off the water first if you can, then request emergency help.