Toilet Shut-Off Valve: Shutting Off Toilet Water Supply

Every house must have a functional toilet. However, plumbing problems do occur. It’s important to know how to switch off your water supply to the toilet through toilet shut-off valve, whether it’s due to a leak in the pipe as well as an overflowing toilet.

An overflowing toilet may rapidly wreak havoc on your floor and bathroom, causing substantial and costly damage. The great news is that you don’t need any equipment or the assistance of a professional to turn off your toilet shut-off valve.


Most toilets have an easily accessible built-in shut-off valve. When repairing items like a wavy flush handle, it’s critical to understand where the valve that cuts off water is.

You will need to turn off the main supply of water to your home for outdated toilets that do not have an integrated shut-off valve. Fortunately for homeowners, turning off your water supply to the toilet is simple and quick.

When should we turn the toilet’s water supply off?

toilet's water supply off

If the toilet starts overflowing, don’t flush it again. This will just cause additional water to rise to the surface and spill over your bathroom floor.

You should also avoid using chemicals for unclogging your toilet. Instead, turn off the water supply on your toilet.

Unless you are unsure where to begin, turning off the water supply through the toilet is rather straightforward. A running toilet may be costly and harmful to the environment. Once you spot a problem with your toilet, always turn off the water.


Toilet Shut-Off Valve

1. Deactivate the Shut-Off Valve Located Behind the Toilet

Typically, the shut-off valve is positioned at the bottom left rear of the toilet. A pipe will emerge from the reservoir and be linked to the wall. Its turn-off valve is typically oval in shape and may be cranked clockwise before it can no longer be turned.

The valve may be difficult to move because it is stiff or rusted, but you may soften it using a lubricant such as WD-40. If you use a wrench, it may shatter and create flooding.

Simply taking a ¼ turn would be good enough. When finished, the water flow should be totally turned off. Flushing your toilet helps you know that it worked.

If the toilet does not refill shortly after flushing, you have done it correctly. If you’ve stopped the valve yet the water is still running, go to the house’s main water supply.

2. Disconnect the Primary Water Supply Valve

If your toilet is older, it might not have an integrated shut-off valve. Turning off the primary water supply valve can turn off water to anything in your house, including showers, sinks, and washing machines.

The primary water supply valve may be near the water heater in the crawlspace, garage or basement, or mounted on an outer wall near the water meter.

3. Turn Off the Water from the Curbside Shut-Off Valve

Because it is unlawful in some jurisdictions, you will need authorization from your water provider to turn off the water from the curbside shut-off valve.

If the previous two stages cannot be completed, this must be your last alternative if your toilet shut-off valve not working. This shut-off valve is positioned right on your property, particularly on the street’s side of the front yard.

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