7 November 2026 · 1 min read · By the Plumbees team
A toilet that will not flush is never convenient. Before you panic, there are a few safe things to try. Many blockages are caused by too much toilet paper or something that should not have been flushed.
Before you start
- Stop flushing. Adding more water can cause the bowl to overflow.
- Put on rubber gloves and lay old towels around the base.
- If the water level is high, scoop some out to a bucket so you have room to work.
What to try
- Use a proper toilet plunger with a flange, not a sink plunger. Make a good seal and push down and pull up steadily rather than sharply.
- Repeat for a minute or two. Often the water level will drop as the blockage clears.
- Pour a bucket of warm, not boiling, water into the bowl from waist height. The force can help clear the pipe. Boiling water can crack porcelain.
- If it is clearing slowly, wait a few minutes and try again.
What to avoid
- Strong chemical drain cleaners, which can damage pipes and make a later manual clearance unsafe
- Wire coat hangers and improvised tools that can scratch the bowl or push the blockage further in
- Flushing repeatedly to see if it works
Signs the problem is bigger
If more than one fitting is slow, if water rises in a bath or shower when you flush, or if the blockage returns quickly, the problem may be further along the drain. That is when you need a plumber, and sometimes a camera survey. Our blocked drains and toilets page explains what we do.
If the toilet is overflowing and you cannot stop it, turn off the small isolation valve behind or beside the cistern, or the main stopcock, and get in touch as an emergency.