Blocked Toilet: Emergency Unblocking

Is it the toilet, or the drain behind it?

Where the blockage sits decides who can clear it and how. Watch what happens when you run the bath or the basin on the same floor. If only the toilet is affected, the blockage is almost always in the pan’s own trap, the S-shaped bend moulded into the ceramic, or just past it in the pan connector. That is where wet wipes, cotton buds, sanitary items and too much paper in one flush tend to lodge.

If the bath gurgles when the toilet is flushed, water comes up in a downstairs shower, or a manhole cover outside has lifted with waste around it, the blockage is further down the soil pipe or in the underground drain. A plunger will not reach that. Lift the nearest inspection chamber cover if you can do it safely: if the chamber is full, the problem is at or beyond it.

Do not pour caustic drain cleaner into a blocked pan. It sits in the standing water, will not reach the blockage, and makes the water dangerous for anyone who then has to put a tool into it.

What we do on the visit

The engineer starts with the least invasive tool. A flanged toilet plunger with a proper seal clears most pan-trap blockages. Next is a toilet auger, a short hand-cranked cable with a rubber sleeve that protects the glaze, which reaches through the trap and into the connector. If an object is wedged in the trap, the pan sometimes has to be lifted off so it can be pushed out from behind, then refitted on a new connector.

If the pan is clear but the water still will not drain, we move to the drain chamber and rod from there towards the house. Once it is running, we flush several times and run the other fittings to make sure the whole run is clear. If the cause is a collapsed or badly laid pipe, we tell you, because clearing it tonight will only buy time. For a wider look at the fittings in this part of the house, our toilet repair service covers cisterns and leaks.

What does unblocking a toilet usually cost?

In market terms, clearing a simple pan-trap blockage is one of the shorter plumbing jobs, often under an hour with hand tools. Lifting the pan to recover an object, clearing a soil stack from a rodding eye, or rodding an underground drain from the chamber all take longer, and a blockage that needs a drain camera to find is the most expensive of the four.

With us the £60 call-out gets an engineer there at any hour, and the price for the clearance is agreed on site before any work starts. See our pricing for how the call-out works.

Is the blocked drain yours or the water company’s?

In England, since October 2011, sewers and lateral drains that are shared with neighbours or run outside your property boundary have been the water company’s responsibility. The drain that serves only your home, inside your boundary, is yours. So if the blockage is in a chamber that also takes a neighbour’s waste, or is under the pavement, it may be a job for the water company, and our guide to a blocked drain Thames Water will deal with explains how to report it.

When a blocked toilet cannot wait

If you have a second toilet that works, a blocked one can usually wait until morning. It cannot wait if it is the only toilet in the house, if sewage is coming up into a shower, bath or floor gully, or if a manhole outside is overflowing. Contaminated water on a floor needs cleaning with disinfectant and gloves, and anything porous it has soaked should be treated as unhygienic. If the pan is also leaking at its base, our guide to a toilet seal leaking explains what that usually means.