How to Unclog a Toilet: Steps Before Calling a Plumber

First: Don’t Flush Again

When a toilet doesn’t flush properly, the instinct is to flush again to “push it through.” Don’t. A second flush often overflows the bowl and floods the bathroom. If the water level is rising toward the rim:

Lift the tank lid
Push down on the flapper to stop water flow
Close the shutoff valve behind the toilet (turn clockwise until snug)

Now you can work without risk of flooding.

Step 1: Wait and Assess

If the bowl is very full, wait 10 to 15 minutes. Some of the water will seep past the clog, dropping the level and making work easier. Put down old towels or newspaper to protect the floor. Wear rubber gloves.

Step 2: Use the Right Plunger

Most home plungers are wrong for toilets.

Cup Plunger (Wrong for Toilets)

The classic red rubber cup is designed for flat surfaces — sinks and tubs. It can’t seal the toilet’s curved bottom.

Flange Plunger (Correct Tool)

A flange plunger has an extended rubber ring inside the cup. The flange tucks into the toilet drain for a strong seal. If you don’t own one, buy one for $10. It works for sinks too (just tuck the flange inside).

Proper Technique

Fit the flange into the drain opening and press to form a seal
The cup should be submerged — if not, add water from the tank (not the tap)
Push down firmly, then pull up sharply — the suction is what clears the clog, not the push
Repeat with firm, steady rhythm for 20 to 30 strokes
After several strokes, pull the plunger off quickly; if water starts draining, you’ve cleared it

Most clogs clear within 1 to 3 minutes of proper plunging.

Step 3: Try Hot Water and Dish Soap

If the plunger doesn’t work, try this before moving to harder methods:

Pour 1/2 cup of dish soap into the bowl
Add a bucket of hot (not boiling) water from about waist height
Wait 15 minutes
Try flushing

Hot water softens organic material; dish soap lubricates the clog through the trap. Effective for moderate clogs, especially if paper is the culprit.

Never use boiling water — it can crack the porcelain.

Step 4: Use a Closet Auger

If plunging and hot water fail, it’s time for a closet auger (sometimes called a toilet snake). $15 to $30 at any hardware store.

Why a Closet Auger, Not a Regular Snake

Regular drain snakes can scratch or crack the porcelain bowl. A closet auger has a protective rubber sleeve on the curved end that prevents damage.

Technique

Extend the cable fully into the auger handle
Place the curved end into the drain with the protective sleeve against the porcelain
Crank the handle clockwise while pushing down gently
When you feel resistance, keep cranking to break up or hook the clog
Pull the cable back, then flush to check

Often the clog comes out on the cable — expect the worst. Have a trash bag ready.

Step 5: Enzyme-Based Drain Cleaner (Last DIY Resort)

If you must use a chemical, skip the traditional drain cleaners like Drano. They are harsh, can damage porcelain and pipes, and create dangerous splashback if the clog doesn’t move.

Instead, use an enzyme-based product formulated for toilets. These work slowly (4 to 8 hours) by digesting organic material. They’re safe for septic systems and pipes.

What Not to Do

Don’t pour boiling water — cracks porcelain
Don’t use Drano in toilets — manufacturer warns against it
Don’t repeat flushing — floods the bathroom
Don’t use a regular drain snake — scratches porcelain
Don’t mix chemical products — can create toxic fumes

When to Call a Plumber

It’s time to call a licensed plumber when:

You’ve tried plunging and augering without success
The toilet clogs repeatedly within days or weeks
Other fixtures (tub, sink) back up when the toilet is flushed
Sewage smells come from the toilet base or other drains
Multiple toilets clog at once
You see water seeping around the base

These symptoms often indicate a main line blockage, tree roots, or broken pipe — problems that require professional equipment. See our drain cleaning guide for more on when DIY stops working.

Typical Plumber Costs

Simple clog clear: $100 to $250
Main line auger: $200 to $500
Hydro jetting: $400 to $900
Camera inspection: $200 to $500
Tree root removal: $300 to $1,000

For emergency situations, see our emergency plumbing tips guide.

Preventing Future Clogs

Most toilet clogs are preventable:

Flush only toilet paper and human waste
Never flush “flushable” wipes, feminine products, paper towels, or dental floss
Use less paper per flush if your toilet is low-flow
Teach children about what goes in the toilet
Keep a small wastebasket next to each toilet
Install a bidet seat to reduce paper use

Older low-flow toilets (1994 to 2005) clog more often. A modern 1.28 gpf toilet uses less water and clogs less. If you’re replacing, look for MaP-rated toilets at 800 grams or higher.

Ready for a Plumber?

If the clog won’t budge or keeps coming back, it’s not just a toilet problem anymore. Trusted plumbers can diagnose and clear the real issue.

Get a free quote and get your bathroom working again.