The Most Common Causes of Sewer Line Failures in Central Iowa
Most homeowners don't think about their sewer line until something goes wrong. Unfortunately, by the time you notice a backup, slow drains, or sewage in the basement, the problem has often been developing for years.
In Central Iowa, sewer lines face unique challenges. Older neighborhoods, mature trees, changing soil conditions, and decades-old piping all contribute to underground plumbing problems.
Understanding what causes sewer line failures can help you catch issues early, avoid emergency repairs, and make informed decisions about your home.
1. Tree Root Intrusion
Tree roots are one of the leading causes of sewer line problems in Iowa.
Roots naturally seek out moisture, and even the smallest crack or pipe joint can allow them to enter a sewer line. Once inside, they continue to grow, restricting water flow and trapping toilet paper, grease, and debris.
Signs of tree root intrusion include:
- Recurring drain clogs
- Gurgling toilets
- Slow drains throughout the house
- Frequent sewer backups
While drain cleaning or hydro jetting can often restore flow, recurring root problems may indicate damaged piping that should be repaired or replaced.
2. Aging Clay Sewer Pipes
Many older homes throughout the Des Moines metro still have clay sewer lines.
Clay pipe was widely used for decades and can last many years, but as it ages, the joints may separate and become vulnerable to root intrusion. Shifting soil can also cause sections of pipe to move out of alignment.
A sewer camera inspection can determine whether an older clay sewer line is still in good condition or beginning to fail.
3. Orangeburg Pipe Deterioration
Some homes built during the mid-1900s were installed with Orangeburg pipe, a material made from compressed wood fibers and asphalt.
While it was an economical option at the time, Orangeburg has a much shorter lifespan than modern sewer pipe. As it ages, it can soften, deform, collapse, or become flattened, restricting the flow of wastewater.
If your home still has Orangeburg pipe, regular inspections can help identify problems before a complete sewer failure occurs.
4. Pipe Bellies (Low Spots)
Over time, soil beneath a sewer line can settle, creating a low spot known as a "belly."
Instead of flowing smoothly, wastewater collects in this section of pipe, allowing grease, debris, and other materials to settle.
Even after the line has been cleaned, recurring clogs often return because the underlying problem hasn't changed.
5. Broken or Collapsed Sewer Pipes
Sewer lines can become damaged for several reasons, including:
- Shifting soil
- Heavy vehicle traffic
- Ground movement
- Tree root pressure
- Aging pipe materials
A cracked or collapsed sewer line usually requires repair or replacement rather than repeated drain cleaning.
6. Grease and Debris Buildup
Many sewer problems begin gradually.
Cooking grease, soap residue, food particles, paper products, and other debris slowly accumulate inside the pipe over time.
Eventually, the buildup narrows the pipe enough to restrict water flow.
Depending on the condition of the pipe, hydro jetting may be an excellent option for removing heavy buildup and restoring proper flow.
7. Flushable Wipes and Other Foreign Objects
Despite the name, many "flushable" wipes don't break down like toilet paper.
Over time, wipes can catch on rough pipe surfaces, roots, or grease buildup, creating stubborn blockages.
Other common items that should never be flushed include:
- Paper towels
- Feminine hygiene products
- Cotton swabs
- Dental floss
- Grease or cooking oil
8. Iowa's Freeze-Thaw Cycles
Central Iowa experiences significant seasonal temperature changes.
Repeated freezing and thawing causes soil to expand and contract throughout the year. Over time, this movement can place stress on underground sewer pipes, particularly older systems with aging joints or existing cracks.
While freeze-thaw cycles may not cause immediate failure, they can contribute to shifting, separation, and long-term deterioration.
How to Catch Sewer Problems Early
The sooner a sewer issue is identified, the more options homeowners often have.
Watch for warning signs such as:
- Slow drains throughout the home
- Gurgling toilets
- Water backing up into showers
- Basement floor drain backups
- Sewer odors
- Recurring clogs
- Wet areas in the yard
If these symptoms continue, it's a good idea to have your sewer line professionally inspected.
Why a Sewer Camera Inspection Is So Valuable
Many sewer problems look similar from inside the house.
A clogged drain, tree roots, a broken pipe, or a belly in the sewer line can all produce similar symptoms.
That's why we often recommend a sewer camera inspection.
Rather than guessing, a camera inspection allows us to see the inside of your sewer line and identify the actual cause of the problem.
Once we know what's happening underground, we can recommend the solution that's right for your home—whether that's drain snaking, hydro jetting, sewer repair, or sewer replacement.
Protect Your Home Before a Sewer Emergency
Sewer line problems rarely improve on their own.
Addressing small issues early can help prevent expensive property damage, repeated service calls, and emergency repairs.
If your home is in an older Central Iowa neighborhood or you've noticed recurring plumbing problems, having your sewer line inspected can provide valuable peace of mind.
Trust Beebe Drain & Sewer Co.
At Beebe Drain & Sewer Co., we proudly help homeowners throughout the Des Moines metro diagnose and solve sewer line problems with honest recommendations and long-term solutions.
Whether you need a sewer camera inspection, drain cleaning, hydro jetting, sewer repair, or a complete sewer replacement, we'll help you understand what's happening underground so you can make the best decision for your home.
Because lasting plumbing solutions begin with finding the real problem—not just treating the symptoms.
Beebe Drain & Sewer Co. proudly serves homeowners in Des Moines, West Des Moines, Urbandale, Grimes, Johnston, Clive, Waukee, Ankeny, Altoona, Pleasant Hill, Norwalk, Indianola, Ames, and surrounding Central Iowa communities.
