A damaged sewer line is one of those problems that starts small and gets expensive fast. Most homeowners do not think about their sewer line until something goes seriously wrong — raw sewage backing up into the house, sinkholes in the yard, or a health department notice. The good news is that sewer lines usually give warning signs well before they fail completely. Here are the seven signs to watch for.
1. Multiple Drains Backing Up at the Same Time
A single slow drain usually means a localized clog — hair in the bathroom sink, grease in the kitchen drain. But when multiple drains back up simultaneously, especially lower-level fixtures like first-floor toilets and tub drains, the blockage is further downstream in the main sewer line. This is the most common first sign homeowners notice.
2. Gurgling Sounds from Toilets or Drains
When your sewer line is partially blocked, air gets trapped in the pipe. That trapped air creates gurgling or bubbling sounds when water flows through nearby fixtures. If your toilet gurgles when you run the bathroom sink, or your kitchen drain bubbles when the washing machine empties, air is escaping through a blockage point in the sewer line.
3. Sewage Smell in the Yard or House
A functioning sewer line is airtight — you should never smell sewage. If you notice a rotten egg or sewage smell inside the house (especially in the basement or lowest level) or in the yard near the sewer line path, the pipe may be cracked or a joint has separated. Tree roots, ground shifting, and age are the most common causes of joint separation in Central Texas clay soil.
4. Soggy Patches or Unusually Green Grass
A cracked sewer line leaks wastewater into the surrounding soil. That extra moisture and nutrients create localized patches of grass that are greener and taller than the rest of the yard. You may also notice soft, soggy spots when you walk across the lawn. In advanced cases, the ground may actually sink or develop a depression along the sewer line path.
5. Slow Drains That Do Not Respond to Cleaning
If you have had a drain professionally cleaned and it slows down again within weeks, the problem is likely not the drain itself — it is the sewer line downstream. A camera inspection can reveal whether tree roots, pipe collapse, or buildup in the main line is causing recurring backups. Repeatedly snaking the same drain treats the symptom, not the cause.
6. Foundation Cracks or Settling
This is a less obvious sign, but a leaking sewer line under or near your foundation can erode the soil that supports the slab. Over time this leads to foundation settling, which shows up as cracks in interior walls, doors that stick or will not close properly, and cracks in the slab itself. In Central Texas, where expansive clay soil already moves with moisture changes, a sewer leak accelerates the process significantly.
7. Pest Infestations
Rats, cockroaches, and other pests use sewer lines as highways. A crack or break in your sewer line gives them a direct path from the public sewer into your yard or even under your home. If you are dealing with recurring pest problems that exterminators cannot solve, a compromised sewer line may be the entry point.
Common Causes of Sewer Line Damage in Central Texas
Tree root intrusion is the number one cause. Roots seek moisture and can enter sewer pipes through the smallest crack or joint gap. Live oaks, pecans, and other large trees common to our area have aggressive root systems. Ground shifting in Central Texas clay soil stresses rigid pipe materials like cast iron and clay tile. Age — homes built before 1980 often have clay or cast iron sewer pipes that deteriorate over decades. Grease buildup from kitchen waste narrows the pipe over time.
What to Do
If you notice any combination of these signs, the first step is a sewer camera inspection. A waterproof camera on a flexible cable is fed through a cleanout access point and into the sewer line. The video shows exactly what is happening — root intrusion, pipe collapse, offset joints, or buildup — and where. This eliminates guesswork and lets us recommend the most cost-effective repair.
Kimco includes camera inspection with sewer service. Repairs range from $1,500 for spot repairs to $3,000–$15,000 for full line replacement, depending on length and method. We offer trenchless repair options when the pipe condition allows. Call (737) 260-7255 to schedule an inspection.