How to unblock a toilet without flooding the bathroom
The first flush is the mistake everyone makes. Here's the correct order, from stopping the overflow to clearing the pan.
First: do not flush again
If the pan is full and the water isn't going down, a second flush adds nine more litres to a bowl that can't take it. That is how a blocked toilet becomes a contaminated bathroom floor.
Take the cistern lid off and push the flush valve or float arm down to stop it refilling, or turn the isolation valve on the supply pipe a quarter turn with a flat screwdriver. Then wait ten minutes — the level often drops on its own, which tells you the blockage is partial.
Hot water and washing-up liquid for a soft blockage
For paper and waste blockages, squirt washing-up liquid into the pan and pour in a bucket of hot — not boiling — water from waist height. Boiling water can crack the ceramic. The height gives you the pressure; the detergent lubricates.
Leave it twenty minutes. If the level drops, repeat once, then flush to confirm.
Plunge with the right tool
A flat cup plunger is for sinks. A toilet needs a flange plunger — the type with a soft rubber sleeve that folds out to seal into the pan outlet.
Insert it at an angle so the cup fills with water rather than air, seat it in the outlet, and pump steadily fifteen to twenty times without breaking the seal. Water compresses far less than air, so a water-filled plunger transmits real force to the blockage.
Use a closet auger
If plunging fails, a closet auger (toilet snake) with a protective sleeve will reach round the trap without scratching the glaze. Feed it in gently, crank clockwise until you meet the obstruction, work through it, then withdraw slowly.
Never use a straightened wire coat hanger. It scratches the porcelain — and scratched glaze catches paper and blocks again permanently — and it can push the object further into the branch pipe.
Objects don't come out with a plunger
Wet wipes, nappies, sanitary products, toys and cotton buds don't break down and don't respond to plunging — plunging just packs them tighter. Wipes are the single biggest cause of blocked toilets in the UK and 'flushable' on the packet means nothing.
If you know something solid went in, stop. It needs pulling out, and sometimes the pan needs lifting. That's a job for a drainage engineer, and it is much cheaper before it's been rammed twenty feet into the drain.
When it's the drain, not the toilet
If more than one toilet is affected, if the bath or shower gurgles or fills when the toilet is flushed, or if the outside manhole is full to the cover, the blockage is in the underground drain.
Nothing you do inside the bathroom will fix that. It needs rodding or high-pressure jetting from the chamber, and a CCTV survey if it keeps happening — repeat blockages in the same place usually mean roots, a displaced joint or a partial collapse.
24/7 help
DrainFixer is family run and answers the phone at 3am. We cover East Grinstead and 20 miles in every direction with jetting units and drain cameras on board.
Call 0330 1331 347.