When a toilet overflows, turn the small valve behind it clockwise to stop more water from coming in, and do not flush again. If the valve will not turn, take the lid off the tank and lift the float so the tank stops filling. Then clean up carefully and figure out whether the clog is in the toilet or further down the line.
Stop the Water
The shutoff valve is usually near the floor behind the toilet. If it is stuck, avoid forcing it hard enough to break it. Lifting the float or pressing the flapper closed inside the tank will stop the flow while you deal with the mess. As a last resort, close the main valve for the house.
Clean Up Safely
Overflow water can contain waste, so put on rubber gloves. Soak up the water with old towels, then wash the floor with soap and water and follow with a disinfectant. If the bathroom is upstairs, check the ceiling below over the next day for signs of water.
Try to Clear It
A flange plunger, which has a rubber sleeve that fits into the toilet drain, works best. Press down slowly to form a seal, then plunge firmly several times. If that does not work after a few tries, stop. Too much force can loosen the wax seal under the toilet and create a leak. Avoid chemical drain cleaners in toilets.
Check the Rest of the House
Run a nearby sink and watch the tub and toilet. Gurgling or rising water in another fixture means the main line is likely involved. In that case, stop using water and call for help.
If the toilet keeps overflowing, it may be time for hands-on help with the clog. If clogs are becoming routine, reviewing how every fixture in the home drains may reveal the cause. Call JPR Plumbing at (833) 603-1840.