How do you unblock a toilet safely?

Prevent an overflow

A blocked toilet can overflow quickly if flushed repeatedly. If the water level is rising, stop using it and turn off the cistern isolation valve if accessible. If there is no valve, do not force one; avoid disturbing the cistern mechanism. Keep children and pets away from contaminated water and wear gloves if cleaning up.

Do not use a sink plunger if it cannot seal properly in the toilet bowl. Do not pour boiling water into the pan, which may crack it, or use chemical drain cleaner unless the product specifically states it is suitable for toilets and you can follow its safety instructions. Never mix products.

Use a toilet plunger

1. 1Allow the water level to settle. If the bowl is nearly full, remove some water with a container into a bucket to reduce splash risk.
2. 2Place a toilet plunger over the outlet so it seals. Keep the rubber submerged where possible.
3. 3Push gently at first, then use controlled strokes without breaking the seal. Avoid vigorous splashing.
4. 4Lift the plunger and wait to see whether the water drains. If it clears, flush once cautiously and be ready to stop the supply if the level rises again.

If plunging does not work

A blockage may be caused by excess paper, a foreign object or a restriction in the soil pipe. Do not use wire coat hangers or sharp tools; they can scratch the pan, damage pipework or push an object further into the drain. A plumber has equipment designed to investigate and clear the obstruction safely.

If other toilets, sinks or outside drains are also backing up, stop using water where possible. This may point to a shared or larger drainage problem rather than a local toilet blockage. TraceFix can help assess plumbing blockages in Birmingham and London.