How to Stop a Toilet Bowl from Overflowing

If your toilet bowl is about to overflow, turn off the water supply immediately. Locate the shut-off valve behind the toilet and turn it clockwise until the water stops refilling the tank.

Once the water is off, it is safe to diagnose what the issue is and fix it. Water rising in the bowl usually means the toilet is clogged. Do not attempt to flush the toilet again until the clog is fixed. This will flood your toilet bowl with more water and make the problem worse.

Most clogs are not completely watertight, so some water will slowly drain through it. Once the water level has dropped, you can begin plunging the toilet.

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How to Stop a Toilet Bowl from Overflowing

How to Stop a Toilet Bowl from Overflowing video thumbnail
How to Plunge a Toilet video thumbnail

Shut Off the Water Supply Valve

If water is rising in the toilet bowl, turn off the toilet's water supply valve before attempting to clear the clog by turning the valve clockwise. Do not attempt to flush the toilet again until the clog is fixed. This will flood your toilet bowl with more water and make the problem worse.

turn off the water supply line

Wait for the Water Level to Go Down

Clear the Clog with a Toilet Plunger

Test the Toilet Before Turning the Water Back On