You can use the toilet while the water is off if it is draining normally. A full cistern provides one normal flush; after that, manually refill the cistern or pour stored water into the bowl. Do not flush if the bowl is blocked, slow to drain, unusually high or backing up.
How to flush without running water
Use any water remaining in the cistern first. For later flushes, choose one of these methods.
Refill the cistern manually
- Carefully lift the cistern lid if it is not attached to the flush controls. Place it on a stable, protected surface.
- Pour stored water into the cistern up to its marked fill line or usual water level. Avoid disturbing the inlet valve, float and other components.
- Operate the flush normally, then replace the lid carefully.
Stop before the water reaches the top of the cistern or enters the internal overflow.
Pour water into the toilet bowl
- Check that the bowl is at its normal level and draining properly.
- Pour carefully at first, then steadily and briskly into the centre of the bowl to trigger a flush while minimising splashes.
- Stop immediately if the water rises instead of draining.
There is no universal amount of water for a manual flush because toilet designs and cistern capacities vary. Use the manufacturer’s instructions where available rather than assuming a full bucket is required.
What water can you use?
Flushing water does not need to be drinking quality, but it must be free from sewage, debris and harmful chemicals. Clean stored tap water or uncontaminated rainwater may be suitable. Never use boiling water because it can damage ceramic or toilet components.
If an uncontrolled leak caused the shut-off, do not restore the water supply just to refill the toilet. If isolation has not yet been completed, follow the safe steps to find and turn off the mains water safely. Do not approach water near electrical equipment or an unsafe valve location.
Washing your hands without running water
Wash with soap and potable stored water from a clean container. Keep handwashing water separate from water used for flushing.
Have someone pour the water or use a container with a controlled spout. Wet your hands, apply soap, rub all surfaces for at least 20 seconds, rinse with potable water and dry thoroughly.
Alcohol-based hand sanitiser is a temporary alternative when hands are not visibly dirty. It does not replace washing after visible contamination or sewage contact. Avoid contact with wastewater. If sewage backs up, stop using the toilet and keep people and pets away from the affected area.
If the water was shut off because the toilet kept running or phantom-flushed, keep it isolated until the fault has been assessed. Do not remove or adjust cistern components if their condition is uncertain.
If the toilet is not draining normally or an uncontrolled leak caused the shut-off, contact our emergency plumbing team for professional help.