Emergency · London · 24/7
Overflowing or Blocked Toilet in London
A rising pan has one mercy: it usually stops just below the rim.
The job is knowing whether the blockage is in the pan, the branch or the shared run, because that decides whether it's a plunger, an auger or the drain kit.
Do this now, while you wait
- Don't flush againThe tank holds another six litres. If the water is high, a second flush puts it on the floor.
- Stop the refillLift the cistern lid and prop the float up, or close the isolation valve on the supply pipe (slotted screw, quarter turn).
- Try one careful plungeA proper flange plunger, slow push, sharp pull. If two attempts don't shift it, stop, enthusiastic plunging past that point damages the pan seal.
- Check the other fixturesIf the shower or sink gurgles when the toilet fills, the blockage is downstream in the shared run, a different job, and useful to know before we arrive.
Why it happens in London
The usual causes
- 01The unflushables
Wipes, cotton wool, sanitary products, toys, the branch pipe's greatest hits.
- 02Scale in the pan outlet
Hard-water scale narrows the trapway over years until a normal flush can't clear it.
- 03Downstream blockage
The toilet is just the lowest point, the real blockage is in the run beneath the house.
- 04A failing macerator
On Saniflo-type installations, the pump not the pipe is usually the culprit, a specialism of ours.
Straight answers
Overflowing toilet, your questions
What does clearing a blocked toilet cost?
£95–£150 fixed for a pan or branch blockage, agreed before we start. If it turns out to be the shared run, we quote the drain work before touching it, no surprise escalation.
Sewage came up in the bath, what do I do?
Stop using all water, keep children and pets away, and call now: backflow into fixtures means the main run is blocked and it will not improve on its own. We prioritise sewage-return calls.
Is one toilet blocking again and again normal?
No, a monthly blockage means a defect: scale, a snag, or a fall problem in the branch. Clearing it repeatedly is renting a solution; a camera look finds what to own.
Do you handle Saniflo units?
Yes, installation and repair, they fail differently to gravity toilets and are frequently misdiagnosed as “blocked” when the macerator or its membrane is the fault.
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