Water around the base of a toilet may come from the connection between the toilet and the soil pipe, but it can also come from the cistern, the supply pipe, a cracked pan or condensation. Because the water often collects in the same place whatever the source, it usually needs tracing before a repair is made.
Finding out when the water appears can be a useful first clue. It also helps to check whether the water is clean or looks like it may contain waste, as this can point to where it is coming from.
Water From Above the Base
Water can run down from higher up and pool at the base. Possible sources include the joint between the cistern and the pan, the bolts that hold the cistern in place, the flush pipe on older toilets, or the supply pipe and isolating valve that feed the cistern.
Condensation can also form on the outside of a cistern in a cold bathroom, then drip down to the floor. This is more likely when the room is warm and damp, such as after a shower.
Water From the Connection to the Soil Pipe
If water appears mainly after the toilet is flushed, it may be coming from where the toilet connects to the soil pipe. The connector or seal at this point can fail, move or be damaged, especially if the toilet is loose.
This type of leak involves waste water, so it is best to avoid contact and clean the area carefully. It does not always mean the seal has failed, as the water may still be coming from higher up.
A Loose or Cracked Toilet
A toilet that moves or rocks when you sit on it can put strain on its connections and lead to leaks. Fixings may have worked loose, or the floor below may have moved.
A crack in the pan or cistern can also leak, sometimes only when the water level is high. Fine cracks can be hard to see, especially around the back of the pan or on the underside of the cistern.
Narrowing It Down
Dry the area and the outside of the toilet with a towel. Then check where the water first reappears and whether it happens after flushing, when the cistern fills or all the time. Placing dry paper towels around joints can help show where the water starts.
Water around a toilet is not always a toilet problem. A leak from a nearby pipe, bath or shower can also travel across the floor and collect at the base.
If water is leaking steadily, closing the toilet’s isolating valve, if it turns easily, may help while you wait. Leaks around a toilet can damage flooring and ceilings below over time.
Our page on repairing a leaking toilet explains how leaks from toilets and cisterns are assessed and repaired.
If water keeps appearing around your toilet, a plumber can trace the source and explain the repair options.