Clogged Toilet? How to Fix It When the Plunger Isn’t Working

A clogged toilet is one of the most common plumbing problems in any home, and most of the time you can learn how to fix a clogged toilet yourself in a few minutes. Repipe Solutions is a licensed Houston plumbing company, and we get called for the clogs that do not clear or keep coming back. This guide covers plunging, what to do when the plunger is not working, and how to tell when the problem is not the toilet at all.

First, Stop a Clogged Toilet From Overflowing

• Do not flush again. If the bowl is high after one flush, a second flush will put more water into a bowl that cannot drain. American Standard advises turning off the water supply as soon as you see a clog and not flushing repeatedly.
• Close the supply valve. It is the small valve on the wall or floor behind the toilet. Turn it clockwise until it stops. If the bowl is rising fast, lift the tank lid and push the flapper down onto its seat to stop water going into the bowl.
• Protect the floor. Lay old towels around the base and wear rubber gloves.
• If you already poured in a chemical drain cleaner, do not plunge. Drano says its liquid drain cleaner should not be used in toilets at all, and that you should never use a plunger during or after using its drain openers, because the chemical may still be in the bowl. Tell the plumber what you used before they start. We explain the other problems with these products in why chemical drain cleaners are bad for your pipes.

How to Plunge a Clogged Toilet the Right Way

Most failed plunging comes down to the wrong plunger. A flat cup sink plunger cannot seal against a toilet’s curved drain opening.

This Old House recommends a flange-style or beehive plunger designed for toilets. Here is how to use it:

1. Check the water level. The cup should be covered with water. Add water from a bucket if the bowl is low, or bail some out if it is near the rim.
2. Seat the plunger. Fold the flange out, put it into the drain opening at the bottom of the bowl, and press down slowly so the air escapes and the cup seals.
3. Pull more than you push. Plumber Richard Trethewey, quoted by This Old House, recommends a pulling motion rather than pushing down, so you do not pack the clog deeper into the narrow part of the trapway. Keep the seal and work the plunger firmly for 20 to 30 seconds.
4. Test it. Lift the plunger. If the water drops quickly, the clog has moved. Open the supply valve and flush once to confirm. If the bowl rises again, close the valve and repeat.

Toilet Clogged and the Plunger Is Not Working? Use a Closet Auger

When plunging fails, the clog is usually jammed tight in the trapway or is a solid object like a toothbrush or toy. The next tool is a closet auger: a short cable inside a curved tube, with a rubber sleeve that protects the bowl.

1. With the supply valve closed, pull the cable back and set the curved end into the drain opening, sleeve against the porcelain.
2. Turn the handle clockwise while pushing gently to feed the cable into the trapway.
3. When you hit resistance, keep turning to hook the clog, then pull back. This Old House advises advancing slowly and pulling back at resistance, so the clog comes out instead of going further in.
4. Retract the cable fully before lifting the auger out, then test with a bucket of water or a single flush.

If the auger reaches the end of its cable and the toilet still will not drain, the blockage is past the toilet. That is a drain line problem, covered below.

Clogged Toilet and No Plunger: What Actually Works

If you do not have a plunger on hand, there are a few gentle options for a soft clog made of toilet paper and waste. None of them will move a solid object.

• Dish soap and hot water. American Standard suggests a squirt of liquid dish soap followed by a pot of hot water, but not boiling water. Pour from waist height and wait several minutes. The soap helps the clog slide and the warm water softens paper.
• Baking soda and vinegar. This Old House lists 1 cup of baking soda followed by 1 cup of vinegar, and notes that natural remedies like this work best on minor clogs.

Skip boiling water and skip chemical drain cleaners in a toilet. If neither works, buy a flange plunger and a closet auger.

Why Does My Toilet Keep Clogging?

One clog is usually just too much paper. A toilet that keeps clogging has a cause. Every toilet sold in the U.S. now has to meet a flush test: according to the EPA WaterSense program, toilets must clear 350 grams of test media and four balls of toilet paper in four of five flushes. A healthy modern toilet should not clog under normal use.

What gets flushed. Houston Public Works has told residents that wipes and paper towels clog the sewer system, that even flushable wipes do not break down well in pipes, and that toilet paper is the only thing that should be flushed, as reported by ABC13.

Something stuck in the trapway. Angi notes that toys, toothbrushes, and other large items can block a toilet without you knowing, and that plunging often only moves them instead of removing them.

A weak flush. American Standard’s own toilet troubleshooting guide lists four causes of a poor or sluggish flush: bowl water level too low, supply valve partly closed, a partially clogged trapway, drain pipe, or vent, and supply pressure too low. First-generation 1.6-gallon toilets from 1994 to the early 2000s are known for weak flushes no matter what you do, and a toilet that clogs constantly with a clear drain line is usually worth replacing. Our post on whether to rebuild or replace a toilet walks through that decision.

A blocked vent. Mr. Rooter explains that the plumbing vent helps the pipes keep proper pressure, and if it is damaged or blocked by debris the toilet can flush with too little force. Vents run through the roof, so this is a job for a plumber, not a ladder.

Toilet Won’t Flush but Not Clogged?

If a bucket of water drains the bowl fine but the handle does nothing, the problem is in the tank. American Standard’s troubleshooting guide lists a closed supply valve, a blocked supply line, a loose or disconnected flush chain, and debris in the fill valve. If the tank also runs or refills on its own, see our guide to a toilet that keeps running.

When a Clogged Toilet Is Really a Drain or Sewer Line Problem

The toilet is the largest fixture on your drain, so it is often the first place a deeper blockage shows up. Signs the clog is past the toilet:

• A closet auger goes its full length and the toilet still will not drain.
• Water comes up in the tub or shower when you flush.
• The toilet gurgles when the washing machine drains or a sink runs.
• Several drains in the house are slow at the same time.
• There is a sewage smell in the bathroom.

When every drain in the house backs up at once, the main sewer line is blocked, and plunging the toilet will not fix it. Our posts on drain line vs. sewer line and sewer line backups explain the difference and the warning signs. For DIY options on the main line, see 7 ways to unclog a sewer line and when to call a pro.

Most Greater Houston homes sit on slab foundations, with the drain lines under the slab. When a toilet keeps clogging with a clear trapway, we camera the line so you see the cause before anyone talks about breaking concrete. Our Houston drain cleaning service runs the camera before and after on main line work.

When to Call a Plumber for a Clogged Toilet

Call a plumber when:

• A flange plunger and a closet auger have both failed.
• You are plunging more than once a month.
• Water backs up into the tub or shower, or more than one drain is slow.
• Water is leaking at the base of the toilet after a clog. See our guide to a leaking toilet.

Here is what the work typically costs with Repipe Solutions in Greater Houston. Every job gets a free, exact quote before work starts.

Frequently Asked Questions

Should I keep flushing to see if the clog clears?

No. If the bowl did not drain after one flush, another flush adds more water to a bowl that cannot empty and risks an overflow. Close the supply valve and plunge instead.

Can I use a sink plunger on a toilet?

It rarely works. A flat cup plunger cannot seal against the curved drain opening of a toilet. Use a flange or beehive plunger made for toilets.

Can I use a regular drain snake on a toilet?

Use a closet auger instead. A standard hand snake can scratch the porcelain, and it is not shaped to follow the toilet’s trapway. A closet auger has a curved tube and a protective sleeve for this job.

Why does my toilet gurgle when the washing machine drains?

The line downstream is likely partly blocked, or the vent is not working. A low fixture that gurgles while another drains often points to the main line. Have it checked before it backs up.

How much does a plumber charge to unclog a toilet in Houston?

With Repipe Solutions, toilet unclogging with an auger typically runs $125 to $300, and main sewer line clearing typically $350 to $650. The quote is free and given before work starts.

Need a Clogged Toilet Cleared in Houston?

Repipe Solutions clears clogged toilets across Greater Houston and checks the drain line when the clog keeps coming back. Quotes are free, there is no trip charge, and same-day service is available. See our toilet repair and installation services in Houston or contact Repipe Solutions to schedule a visit.

Featured photo: “White toilet in a tiled bathroom” by dirtyboxface via Openverse, licensed under CC BY 2.0, converted to WebP.