Sewage backing up into your home is one of the most stressful plumbing emergencies — and one of the most expensive if you wait too long to act. The good news: you have about 30 minutes to take three actions that limit the damage and a few diagnostic clues that tell you whether this is a $250 cleaning or a $5,000 line replacement. Here is what to do right now and what to expect.
First — Stop Adding to It
1. Stop running water. No flushing toilets, no running the dishwasher, no washing machine, no shower. Every gallon of water you put down a drain right now goes into the same line that is backing up. Tell everyone in the house.
2. Shut off the water supply to your home if needed. If anyone is going to use water without thinking (or if there is a slow leak somewhere), shut the main valve at the curb or near the front hose bib. You can turn it back on once the backup is cleared.
3. Get out of the affected room. Sewer water carries pathogens. Do not stand in it, do not let kids or pets into the area, and do not try to clean it up with a regular mop — you will spread the contamination.
How to Tell What Kind of Backup You Have
Three quick checks tell you whether this is a localized clog or a main sewer line problem:
### Check 1: How Many Drains Are Affected?
Just one fixture (one toilet, one sink, one tub): Localized clog. The backup is in the branch line serving that fixture, not your main sewer line. Cheaper to fix.
Multiple fixtures, especially the lowest drain in the house (ground-floor tub, basement floor drain): Main sewer line backup. The blockage is downstream of where all your home's drains meet, so everything is backing up to the lowest point.
### Check 2: What Happens When You Flush a Toilet?
If flushing a toilet causes the bathtub to gurgle or fill with sewage, that is a classic main sewer line indicator. Water is being pushed down the line, hitting the blockage, and rising back up through the next-lowest drain.
### Check 3: Is Your Yard Wet, Sunken, or Smelly?
If you have a soft, sunken, or wet area in your yard above where the sewer line runs (typically from your house toward the street), the line may have collapsed or be leaking. Common in older Central Texas neighborhoods with cast iron or clay sewer pipes from the 1960s–1980s.
The Most Common Causes (Central Texas Specific)
Tree roots. The single biggest cause of sewer line failure in Central Texas. Live oaks, pecans, hackberries, and Mexican white oaks all send aggressive root systems toward sewer lines, which leak slightly and attract roots. The roots enter through pipe joints, grow, and eventually block the line. Common at 5–25 years out from the tree.
Pipe collapse on older homes. Cast iron lines from the 1960s and earlier corrode from the inside. Clay tile lines from the 1940s–1970s crack and shift. Both are heavily represented in older neighborhoods around Bastrop, downtown Brenham, central Taylor, and similar towns. Once the pipe collapses, no amount of cleaning fixes it — replacement is the only option.
Bellies (low spots). Soil shifting under a sewer line can create a sag where solids accumulate over time. Eventually the pipe blocks completely. Cleaning works temporarily but the belly needs to be re-pitched (which means digging) for a permanent fix.
Foreign objects. Wipes (even "flushable" ones, which are not), hygiene products, paper towels, kids' toys. These are 100% of the time the cause when a backup happens with no other warning signs in a newer home.
Grease buildup. Cooking grease poured down kitchen drains hardens in the cooler sewer line and accumulates at fittings. More common in homes with cast iron drain piping inside the walls.
What Repair Actually Costs
Drain snake / mechanical clearing: $250–$500. The plumber feeds a motorized cable through the line to break up the blockage. Works well for soft blockages (paper, grease, soft roots). Does not fix collapsed pipe.
Hydro jetting: $400–$800. High-pressure water (3,000–4,000 PSI) scours the line, removing roots, grease, and scale. More effective than snaking for severe blockages and root intrusion. Often included with camera inspection.
Camera inspection: $200–$400 standalone, often included free with hydro jetting. A waterproof camera shows the exact condition of the line so you know what you are dealing with — clog, root intrusion, belly, or collapse.
Spot repair (replacing one section): $1,500–$4,000. If the camera shows damage at one location, the plumber digs to that spot and replaces the damaged section.
Trenchless pipe repair / pipe lining: $4,000–$10,000. A new pipe is pulled through the existing line or a liner is bonded to the inside. No major excavation. Best option when the line runs under driveways, mature trees, or finished landscaping.
Full sewer line replacement (traditional excavation): $5,000–$15,000+ depending on length, depth, and what is on top of the line. Most expensive option but sometimes the only option for severely collapsed lines.
What to Watch For Next Time (Warning Signs)
Most main sewer line backups give warnings for weeks or months before the full backup. If you ever see:
Multiple drains slow at the same time (especially toilet + tub on the same level)
Gurgling toilets when other drains are used
Wet spots or unusually green grass over the sewer line
Sewage odors in the yard or around floor drains
Frequent toilet clogs without an obvious cause
...get a camera inspection done before you have a flood. A $300 inspection now can prevent $3,000 in cleanup.
When to Call Us
Sewer backups are emergencies. Same-day service across Central Texas — Pflugerville, Bastrop, Taylor, Elgin, Georgetown, Hutto, Manor, Cameron, Rockdale, Brenham, and our full service area. We carry hydro jetting and camera equipment on every truck — most clogs are diagnosed and cleared in a single visit. Call (737) 260-7255. Texas license M-37654. Flat-rate pricing on every drain and sewer service.