# Toilet clogged or overflowing: what to do right now

Updated: 2026-10-24 · https://pros411.com/en/guides/plumbers/toilet-overflowing-or-clogged

## Short answer

If your toilet is clogged and the bowl is rising, lift the tank lid and push the flapper down. Then turn the shut-off valve behind the toilet clockwise until it stops. With the water off, use a flange plunger (it has a soft sleeve underneath): one slow push, then firm ones. If water comes up in the tub or other drains, stop plunging and call a plumber: it is usually the main sewer line.

## How to stop an overflowing toilet and unclog it

![Cartoon toilet overflowing, with a plunger on the way](https://pros411.com/img/guias/toilet-overflowing-or-clogged.webp)

1. **The bowl is rising: don't flush again.** Every flush sends more water into a bowl that cannot drain. Leave the handle alone.
2. **Lift the tank lid and press the flapper down.** The flapper is the rubber seal at the bottom of the tank. Holding it down stops more water from reaching the bowl.
3. **Turn the shut-off valve clockwise.** It is the oval knob on the wall behind the toilet. Turn it to the right until it stops: the toilet stops filling.
4. **Plunge with a flange plunger.** Fit the cup over the drain hole, push slowly the first time, then pump firmly 10 to 15 times. The level drops when the clog breaks.
5. **Turn the water back on slowly.** Open the valve counterclockwise, let the tank fill and flush once with your hand near the flapper. Then dry the floor.

## If the shut-off valve is stuck or missing

Lift the float (the ball or cup inside the tank) and hold it up. While you hold it, have someone shut off the main water valve to the house.

## Unclog it the right way

1. Wait a few minutes: sometimes the level drops on its own and the clog loosens.
2. Use a flange plunger, not a flat sink plunger. Fit its soft sleeve into the drain hole so it seals, with enough water in the bowl to cover the cup.
3. Push down slowly the first time (to push out the air), then pump firmly 10 to 15 times without breaking the seal. Pull up sharply at the end.
4. Still clogged? Try a toilet auger (closet auger). Feed the cable into the drain while you crank the handle, then pull it back out.
5. Open the valve slowly and flush once, with your hand ready to push the flapper down if the bowl rises again.

## What not to do

- Do not keep flushing to "push it through": every flush adds water to a bowl that is already full.
- Do not pour chemical drain cleaner into a toilet. It rarely reaches the clog, can damage old pipes and is dangerous if it splashes.
- Do not use a wire hanger or other metal: it scratches the porcelain and can push the clog deeper.

## Clean up safely

Toilet water carries bacteria, so keep kids and pets out of the bathroom until it is clean. Wear gloves and soak up the water with old towels. Wash the floor with soap and water, then disinfect it, and run the towels through a hot wash. If water got under the floor or into the ceiling below, take photos for your insurance before you clean.

## When to call a plumber

- Water comes up in the tub or shower when you flush, or several drains are slow at once (likely the main sewer line).
- Water leaks from the base when you flush (the wax ring under the toilet has failed).
- The same toilet clogs again every few days.
- Something solid fell in (a toy, a phone, a toilet brush head).
- You smell sewer gas in the house.

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## Frequently asked questions

### How do I stop a toilet from overflowing?

Push the flapper down inside the tank, then turn the shut-off valve behind the toilet clockwise. If the valve is stuck or missing, hold the float up and shut off the main water valve to the house.

### Should I use a plunger or an auger on a clogged toilet?

A flange plunger first. If 10 to 15 firm pushes do not clear it, try a toilet auger. If that fails too, or other drains are slow, call a plumber.

### Is an overflowing toilet an emergency?

It is urgent when sewage comes up in other drains, water gets into walls or ceilings, or it is your only toilet. Use the "24/7 emergencies" filter on the list to find plumbers who take calls now.

### Can I use drain cleaner in a toilet?

Better not. It rarely works on toilet clogs, it can damage pipes, and it is dangerous if it splashes or mixes with products a plumber uses later.

### Why does my toilet keep clogging?

Usually too much paper at once, “flushable” wipes that do not break down like paper, or a weak flush on an older low-flow toilet. If it clogs every few days, the problem is further down the line: call a plumber.