Toilet overflow
A toilet overflowed. Mop or crew depends on which side of the trap it came from.
Lift the cistern lid and push the flush valve down, or close the isolating tap behind the pan. Then work out which side of the trap the water came from: clean water from the cistern is one job, water pushed back from the drain is another, and the difference decides what gets dried and what gets thrown away.
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Stopping it takes ten seconds if you know where to push
Take the cistern lid off and press the flapper or flush valve flat against its seat with your hand. That stops water entering the pan immediately. Then close the small isolating tap on the pipe behind or below the cistern so it cannot refill while you deal with the floor.
Most people run for a mop first and lose several gallons doing it. The lid is faster, and it is the difference between one wet room and three.
Which side of the trap decides the whole job
Water that overflowed from the cistern or the bowl before anything was flushed is clean, and wet material can usually be dried in place. Water that came back up from the drain has passed through the sewer side, and porous material it soaked is discarded rather than dried.
A blocked pan that overflowed with waste in it sits in the second group, however clear the water looks by the time it reaches the hallway.
This is not a judgement about how dirty it appears. It is about whether the material can be cleaned all the way through, and porous material cannot.
An upstairs overflow is a ceiling job
On an upper floor the water finds the gap around the soil pipe and goes straight down. The bathroom may look nearly dry while the ceiling below holds several gallons. Deal with the ceiling first: clear the room beneath, and release a bulge deliberately rather than waiting for it to fail.
Tile floors make this worse rather than better, because the water travels under the tile bed and emerges some distance from where it started.
Same puddle, different obligations
An overflow reaches four people in four different ways.
- 01You own and live here. Establish clean or contaminated first, because everything else follows from it. If contaminated, keep people out and call someone who handles that specifically.
- 02You own it and rent it out. A blocked drain is the building and therefore yours. A tenant who blocked it is a recovery question for afterwards, not a reason to delay drying.
- 03You live above someone. Tell the flat below immediately, before their ceiling shows it. Their claim is on their policy and your liability question follows separately.
- 04You rent here. Report it in writing. If it is contaminated, say so plainly in the message: habitability duties bite harder and faster when sewage is involved.
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What to ask before you agree to anything
Ask these of whoever turns up. A contractor who answers them plainly is the one you want; a contractor who will not is telling you something.
- 01Are you treating this as clean or contaminated water, and what made you decide?
- 02What is coming out and what is being dried? Point at each.
- 03How are you handling the floor build-up under the tile, if there is one?
- 04Is the ceiling below wet, and how are you drying the void?
- 05What are you doing about the smell after the material is out?
- 06Give me the licence number and the name it is registered under. I would rather check than assume.
Have this ready before you call
Three facts move the first minute past the formalities: what happened, when it started, and whether water is still moving. These add the detail that decides what gets loaded on the van.
- Whether it overflowed clean or with waste in the pan
- Which floor the bathroom is on and what is directly below it
- What the bathroom floor is: tile, vinyl, timber
- How far the water reached: bathroom only, hallway, other rooms
- Whether the drain is blocked or it was only a cistern fault
- Whether anyone in the house is pregnant, elderly or immunocompromised
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Where these figures come from
Every number on this page is published by someone other than us, and each link goes to their own text rather than to a summary of it.