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Common Causes of Clogged Sewer Drains and How to Fix Them

Common Causes of Clogged Sewer Drains and How to Fix Them

Clogged sewer drains are blockages in a home’s main wastewater line that prevent proper drainage. Grease buildup, tree roots, or foreign objects that have entered the pipe often cause these clogs. Professional sewer drain cleaning removes these obstructions, restoring flow and preventing costly water damage or backups.

Few home issues are more frustrating than slow or completely clogged sewer drains. What starts as a small gurgle or foul odor quickly turns into a messy, expensive emergency.

Across Utah and similar regions, shifting temperatures and aging infrastructure add extra stress to these systems. In this guide, you’ll learn what causes clogged sewer drains, step-by-step ways to fix them, and how regular sewer cleaning keeps your home safe, efficient, and odor-free.

Whether you’re dealing with a minor blockage or planning preventative maintenance, this guide provides practical, professional insight. Let’s dive in. 

Table of contents

What are clogged sewer drains?

Step-by-step sewer drain cleaning guide

A real-life example

Why sewer cleaning matters

Common mistakes to avoid

Key sewer maintenance statistics

Recommended tools and products

FAQs about clogged sewer drains

What makes Utah unique

Call Neighborly Plumbing today

What are clogged sewer drains?

These clogs occur when wastewater cannot pass freely through your home’s main sewer line. Common causes include hair, grease, paper products, food waste, or invasive tree roots that break into underground pipes. Over time, these blockages cause slow drains, unpleasant odors, or even sewage backups in your bathtub or basement.

Step-by-step sewer drain cleaning guide

  1. Identify the signs early
    Watch for slow drains, bubbling toilets, foul smells, or water pooling near floor drains. These are early indicators of clogged drains.
  2. Turn off the water supply
    To prevent overflow or additional pressure on the line, shut off your main water valve before working on the drain.
  3. Locate the cleanout access point
    Most homes have an exterior cleanout (a capped pipe). Remove the cap carefully; pressure may be released if there’s a blockage.
  4. Use a plumbing auger or snake
    Feed the auger through the line to break through blockages. Rotate the cable slowly until resistance lessens and flow returns.
  5. Flush the line thoroughly
    Once you’ve cleared the clog, run hot water for several minutes to flush out any remaining debris. Professional sewer cleaning teams often use hydro-jetting for a more thorough flush.
  6. Schedule a professional inspection
    Even after you try DIY fixes, a licensed plumber will run a camera inspection to confirm they removed the clog and to check the pipes for damage.

A plumber is working on a bathroom sink adjusting pipes and fixtures to ensure proper drainage

Real-life example

A homeowner in Spanish Fork noticed wastewater backing up into their basement shower. After a camera inspection, technicians discovered tree roots had infiltrated their main line. A hydro-jetting service removed the blockage and restored normal flow. They now schedule sewer drain cleaning twice a year to prevent regrowth.

Why sewer cleaning matters

Regular cleaning provides a range of short- and long-term benefits:

  • Prevents costly sewage backups and water damage
  • Extends the lifespan of underground piping systems
  • Improves overall drainage and water flow
  • Helps identify tree root intrusion early
  • Maintains sanitary, odor-free environments
  • Reduces emergency plumbing calls and repair costs

Proactive maintenance saves thousands of dollars over time compared to reactive clog removal.

Common mistakes to avoid

  1. Using chemical drain cleaners
    Harsh chemicals corrode pipes and damage your plumbing in the long run. Stick to mechanical or enzyme-based solutions.
  2. Ignoring early warning signs
    A slow drain rarely fixes itself. Prompt cleaning prevents a complete blockage.
  3. Overusing DIY tools
    Forcing a drain snake too hard damages older pipes. Seek help when resistance feels solid.
  4. Flushing non-flushables
    Items like “flushable” wipes, paper towels, and feminine products should never go down a toilet — they’re a leading cause of clogged drains.
  5. Neglecting preventive maintenance
    Annual or biannual drain cleaning prevents small issues from turning into major emergencies.

Key sewage maintenance statistics

  • 45% of sewage clogs stem from grease and food waste buildup
  • 70% of Utah homes over 30 years old have outdated clay or cast-iron pipes prone to root intrusion
  • 60% of homeowners wait until a complete backup before calling for sewer cleaning
  • 85% of repeat clogs could have been prevented with scheduled maintenance
  • An emergency plumber costs up to $600 as opposed to regular maintenance 

A person photographs a tree with a camera capturing its details and surrounding environment

  • Heavy-duty plumbing auger or snake
  • Enzyme-based drain cleaner (eco-friendly option)
  • Hydro-jetting service (professional-grade cleaning)
  • Rubber gloves and pipe wrench
  • Sewer inspection camera for visual checks
  • Root barrier system for tree-heavy areas

FAQs about clogged sewer drains

Q: How often should I schedule cleaning?

Homeowners should schedule professional cleaning at least once a year to maintain their system's health. If your home has older pipes, large trees, or frequent clogs, consider semi-annual cleaning to prevent major blockages and costly backups.

Q: What is the best way to fix clogged drains?

The most effective way to fix clogged drains is to remove debris using a plumbing auger or professional hydro-jetting service. Always follow the cleaning with a camera inspection to confirm the line is clear and free from hidden damage.

Q: Can tree roots cause clogs in your sewer line?

Yes. Tree roots often invade underground pipes through small cracks or joints, causing stubborn blockages and pipe damage. Regular inspections and preventive cleaning help detect root intrusion early, keeping your line flowing properly year-round.

Q: How can I tell if my main drain is clogged?

Common signs of a mainline clog include multiple drains backing up at once, gurgling noises when flushing, or sewage odors near tubs and toilets. These warning signs suggest a blockage that needs prompt cleaning or inspection.

Q: Are chemical drain cleaners safe?

No. Chemical drain cleaners may provide short-term relief but corrodes older pipes, weaken seals, and release harmful fumes. It’s safer and more effective to use enzyme-based products or schedule professional cleaning for lasting results.

Q: How can professional sewer cleaning save me money long-term?

Regular professional cleaning prevents costly emergencies by catching buildup, cracks, and root intrusion early — before they cause major damage. Routine cleaning enhances flow efficiency, reduces the risk of backups, and prolongs the lifespan of your plumbing system, saving you hundreds (or even thousands) in future repair and water-damage restoration costs.

What makes Utah unique

In northern Utah, where winter temperatures frequently drop below freezing, clogged drains often occur due to freeze–thaw cycles that expand and contract underground pipes. This constant movement causes cracks that allow soil and tree roots to invade the line. 

In central areas like Utah County or the Wasatch Front, shifting soils and high clay content make older pipes especially vulnerable to misalignment and buildup of blockages.

In contrast, southern Utah experiences higher mineral content in its water supplies, leading to sediment accumulation that restricts flow and causes recurring clogs. Homes built before the 1980s are particularly at risk because many still rely on aging cast iron or clay pipes that corrode or crumble over time. 

By investing in regular cleaning and inspections from Neighborly Plumbing, Utah homeowners can safeguard their systems against local conditions and enjoy year-round reliability.

A person holds a piece of metal over a sink preparing to clean or inspect it

Call Neighborly Plumbing today

Sewage issues rarely happen at a convenient time — and when they do, you need a team you trust to respond fast and fix the problem right the first time. 

Neighborly Plumbing is your local expert for emergency cleanouts, routine sewer drain cleaning, and complete inspections. Our technicians utilize professional-grade tools and advanced camera technology to locate and remove blockages, minimizing unnecessary damage to your property.

Whether you’re dealing with slow drains, recurring clogs, or a complete blockage, we provide prompt service 24/7, ensuring your home remains clean, safe, and fully functional. Scheduling regular sewer cleaning with Neighborly Plumbing also helps prevent future problems, saving you time, money, and stress in the long run.

Protect your home and restore confidence in your plumbing system today. Call Neighborly Plumbing now or book your sewer cleanout online for fast, dependable service backed by local expertise and genuine care for your home and comfort.

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Mission

To serve our Wasatch neighbors in their plumbing, drain, and renovation needs. We are committed to giving you a reliable, fair, and ethical service with our local, experienced team. We strive to ensure that once our services are done, you will never need to call another plumber again.
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