Why Your Toilet Keeps Clogging: A New Jersey Guide

Common causes of a toilet that keeps clogging

The most common cause is what goes into the toilet. Wipes, even ones labeled flushable, paper towels, cotton swabs, dental floss and feminine products do not break down like toilet paper. They catch inside the toilet trap or the drain line and build up a little at a time. Too much toilet paper in one flush can do the same. Older low flow toilets may also struggle more with heavy loads.

Another common cause is a partial blockage that never fully cleared. A plunger may push water past a small object lodged in the trap, but the object stays and catches the next load. Children often drop toys or small items into toilets, and those can stay stuck for a long time. Hard water deposits can also narrow the small passages inside an older toilet over time. If plunging works for a day and then the clog returns, a stuck object or buildup in the trap is a likely cause.

• Wipes, even flushable ones
• Paper towels, swabs, floss and hygiene products
• Too much toilet paper at once
• A small object stuck in the trap

When the problem is beyond the toilet

Sometimes the toilet is just where the problem shows up. If the main sewer line is partly blocked, the toilet is often the first fixture to back up because it sends the most water at once. Signs include gurgling in the toilet when the sink or tub drains, water rising in the tub when the toilet flushes, or several drains running slow at the same time. Pay attention to which drains react together.

In many New Jersey homes, especially older ones with clay tile or Orangeburg laterals and mature trees nearby, roots in the main line are a common cause. Grease and buildup in the line are another. If the toilet clogs along with other signs, a main line cleaning and a camera inspection are the right next steps. Clearing the toilet alone will not solve a main line clog, and the problem will keep returning.

• Gurgling when other fixtures drain
• Water rising in the tub when the toilet flushes
• Several slow drains at once
• Water in a basement floor drain

Safe steps to try first

Start with a good plunger. A flange plunger, which has an extra rubber sleeve on the bottom, seals better in a toilet than a flat cup plunger. Make sure there is enough water in the bowl to cover the plunger, then push and pull steadily. If the bowl is close to overflowing, lift the tank lid and close the flapper, or turn off the water supply valve behind the toilet.

A toilet auger, also called a closet auger, can reach into the trap to break up or pull out a clog without scratching the bowl. Use it gently. If neither tool works, or the clog comes back right away, stop and call for service. Repeated forcing can push the blockage further down the line. Wear gloves and have old towels ready, since a clogged toilet can splash. Clean the tools afterward with hot water and disinfectant.

• Use a flange plunger, not a flat cup
• Turn off the supply valve if the bowl is near the rim
• Try a closet auger gently
• Stop if the clog returns quickly

What not to do

Do not pour chemical drain openers into a clogged toilet. They often do not reach the clog, they can sit in the bowl and they can splash on skin and eyes when you plunge afterward. Never mix different chemical products, since some combinations release harmful fumes. Do not keep flushing a clogged toilet to see if it clears, because that is how bowls overflow. Chemicals can also damage some older pipes.

Avoid using wire hangers or other improvised tools in the bowl, since they can scratch the porcelain and rarely reach the real clog. If you used a chemical product before calling for help, tell the technician so they can work safely. Do not pull the toilet off the floor yourself to reach a clog. Patience and the right tool solve most toilet clogs. When they do not, the clog is likely deeper in the line and needs a drain technician with the right equipment.

• Do not use chemical drain openers in a toilet
• Never mix chemical products
• Do not keep flushing a clogged toilet
• Tell the technician about any chemicals used

How a drain technician fixes repeat clogs

A drain technician starts by finding out whether the problem is in the toilet or further down the line. For a clog in the toilet trap, a professional closet auger usually clears it. If an object is stuck, the technician may need to remove it from the trap. If the line beyond the toilet is the problem, a cable machine or jetting from a cleanout clears it. The toilet is then tested with several flushes.

For repeat clogs, a camera inspection is the best way to find the cause. It shows roots, buildup, sags or objects in the line. Fullerton shows the live camera view, records the footage and explains what we see. If we find something beyond the drain, we tell you so you can plan the next step. You also get advice on habits that keep the toilet working, like what not to flush.