How to Turn Off the Water Supply to a Toilet

1 Close this valve by turning it clockwise, as you would a faucet.Look for a faucet/tap on the pipe that leads to your toilet cistern. If you find one, turn it to the right.

If you've found the valve and successfully turned it, you don't need to read the rest of these steps!
2 A traditional gravity toilet tank. 1. float, 2. fill valve, 3. lift arm, 4. tank fill tube, 5. bowl fill tube, 6. flush valve flapper, 7. overflow tube, 8. flush handle, 9. chain, 10. fill line, 11. fill valve shaft, 12. flush tubeIf you have an older system (pre-1970s) your toilet may not have a shut-off valve. Take the lid off the tank, and find the float (1). It will be a small container of air, designed to float on top of the water in the tank. When it's floating at a certain height, the valve stops letting water into the tank; when you flush the toilet, the float falls with the water level and reopens the water valve. This allows the toilet to refill, stopping when the float reaches the correct height again. So, to get to the point, you need to prevent the float falling when the water level drops.
3Try slipping a narrow length of wood under the lift arm/float lever (3) and balancing it on both sides of the tank to hold the lever up. If the sides of the tank are too high up to do this, you'll need another method.
4Take a thick elastic band that doesn't stretch as easily. Wrap it around the lift arm/float lever (3) in a loop. Take a curtain hook or similar and slip it onto the elastic band. Hook it over the side of the tank.
5Flush the toilet to empty it. The tank should empty, and the wood/band should hold the lift arm up so that the valve doesn't open and let water in.
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