Why Do My Drains Keep Clogging? Causes and Fixes

One clog is annoying. A drain that clogs again and again is telling you something. Our licensed Atlanta plumbers explain the most common reasons drains keep clogging, what you can safely try at home, and when it is time for professional drain cleaning.

First, Figure Out Which Drains Are Clogging

Where the clog shows up is your biggest clue.

• One fixture only: The problem is most likely in that fixture’s trap or branch line.
• Several fixtures in one bathroom: The clog may be in the shared branch line.
• Drains all over the house: This points to the main sewer line. Learn more about sewer line repair and call a plumber.

Common Causes of Repeat Clogs

Bathroom Sinks, Showers, and Tubs

Hair is the top cause. It mixes with soap scum, toothpaste, and shaving cream to form a sticky mat that grabs more debris every day. Removing the visible hair at the stopper often leaves the rest of the clog deeper in the pipe, so it comes back quickly.

Kitchen Sinks

Grease, oils, and fats go down as a liquid but cool and harden in the pipe. Food scraps stick to that coating, and the pipe gets narrower with each meal. Coffee grounds, rice, pasta, and eggshells make it worse.

Garbage Disposals

A garbage disposal grinds food but does not make it disappear. Fibrous foods like celery and onion skins, starchy foods, and grease can collect in the drain line. A dull or failing disposal can also send larger pieces into the pipe.

Toilets

Wipes (including ones labeled “flushable”), paper towels, cotton swabs, and hygiene products are frequent culprits. Using a lot of toilet paper in an older low-flow toilet can also cause repeat clogs.

Buildup Inside Older Pipes

In older Atlanta homes, cast iron drain lines can develop rough scale inside. That rough surface catches debris, and the pipe gradually narrows. Snaking may open a path, but the buildup stays and the clog returns.

Tree Roots and Damaged Lines

If your main line clogs repeatedly, roots or a sagging section of pipe may be to blame. Atlanta’s mature trees send roots into older sewer lines through small cracks and joints.

Venting Problems

Plumbing vents let air into the system so water drains smoothly. A blocked vent can cause slow drains and gurgling. This is less common, but a plumber can check it.

What You Can Safely Try at Home

• Use a plunger. Use a cup plunger for sinks and a flange plunger for toilets. Cover the overflow hole on sinks and tubs for a better seal.
• Clean the stopper and strainer. Pull out the pop-up stopper and remove hair and gunk.
• Try a hand drain snake. A small plastic hair snake or hand auger can reach clogs in sink and tub drains.
• Clean the P-trap. Under a sink, put a bucket down, unscrew the trap, clear it, and reinstall it snugly.
• Flush with hot water. Hot tap water can help move soft buildup in kitchen drains. Avoid pouring boiling water into toilets or PVC fittings.

Skip harsh chemical drain cleaners. They often do not clear the whole clog, they can be hard on older pipes, and they create a hazard for you and for the plumber who works on the drain later. Never mix drain products.

When to Call a Professional

Call a plumber if:

• The same drain clogs again within weeks
• More than one fixture is slow or backing up
• You hear gurgling from drains or toilets
• You notice sewage odors
• Water backs up into a tub or floor drain
• Home remedies are not working

Our drain cleaning service clears the full clog, not just a small opening. When we suspect a deeper issue, a sewer camera inspection shows what is inside the line.

When Hydro Jetting Makes Sense

For heavy grease, scale, or root buildup, snaking may only poke a hole. Hydro jetting uses high-pressure water to scour the inside walls of the pipe and flush the debris away. It is a good option for kitchen lines and main lines that keep clogging, as long as the pipe is in sound condition. We check that first.

How to Keep Drains Clear

• Use hair catchers in showers and tubs, and clean them often.
• Wipe greasy pans with a paper towel before washing. Throw cooled grease in the trash.
• Run cold water while using the disposal and for a few seconds after.
• Keep fibrous, starchy, and hard items out of the disposal.
• Only flush toilet paper and human waste.
• Schedule professional drain cleaning if you have a history of repeat clogs.

Drain Clog FAQs

Why does my drain clog again right after I clear it?

Usually the first fix only opened a small path through the clog. Hair, grease, or scale still coats the pipe, so debris catches again quickly. Repeat clogs can also come from a problem further down the line, like roots or a sagging pipe. Professional drain cleaning clears the full pipe, and a camera inspection can find hidden causes.

Are chemical drain cleaners safe for my pipes?

We don’t recommend them. They often don’t clear the entire clog and can be hard on older pipes and fittings. They also create a safety hazard for anyone who works on the drain afterward. Try a plunger, hand snake, or cleaning the trap first. If that doesn’t work, call a licensed plumber.

What is the difference between snaking and hydro jetting?

Snaking uses a cable to break up or pull out a clog, which works well for many simple blockages. Hydro jetting uses high-pressure water to clean the inside walls of the pipe, removing grease, scale, and roots. It is often better for recurring clogs. We check the pipe condition first to choose the right method.

Can a garbage disposal cause clogs?

Yes. Grease, starchy foods, fibrous vegetables, and coffee grounds can build up in the drain line below a disposal. A dull or failing disposal can also let larger food pieces through. Run cold water while grinding, avoid problem foods, and call us if your disposal jams or drains slowly.