Toilet Repair near you

A leaking WC is the most expensive plumbing fault most households never notice, because it makes no puddle and often no noise. Severn Trent describes a single leaking toilet as capable of wasting up to 400 litres a day, notes that between 5 and 8 per cent of toilets are leaking, mostly dual flush ones, and explains why it goes unseen: the water dribbles invisibly down the back of the pan rather than pooling anywhere you would look.

The test is simple and companies hand out the kit. Water companies supply free dye tablets; drop one into the cistern, leave it without flushing, and if colour appears in the pan the cistern is leaking past the flush valve. A paper towel pressed to the back of the dry pan for a few minutes does much the same job if you have no tablets.

If the test is positive, treat it as a repair rather than a curiosity. The parts that fail are usually the flush valve seal or the siphon diaphragm, and both are ordinary replacements. Where the leak is at the float valve instead, the giveaway is water running steadily to the warning pipe, which the regulations require to discharge somewhere the flow can readily be seen — that visibility is the point of it.

Schedule 2 to the Water Supply (Water Fittings) Regulations 1999 governs what may be fitted in England and Wales. No flushing device installed for use with a WC pan may give a single flush exceeding 6 litres for WCs installed after 1 January 2001. A flushing device designed to give flushes of different volumes must not have a lesser flush exceeding two-thirds of the largest flush volume, must have a readily discernible method of actuating each flush, and every flushing cistern other than a pressure flushing cistern must carry an indelible internal line marking the intended volume together with an indication of that volume. Cisterns also need a warning pipe or a no less effective device.

Pressure flushing valves come with a backflow condition attached: where one is connected to a supply pipe or distributing pipe, the flushing arrangement must incorporate a backflow prevention device consisting of a permanently vented pipe interrupter located not less than 300mm above the spillover level of the WC pan or urinal.

Scotland runs the same substance under its own instrument. The Water Supply (Water Fittings) (Scotland) Byelaws 2014, made on 13 May 2014 under the Water (Scotland) Act 1980, apply the 6 litre single flush limit and the two-thirds rule for the lesser flush of a dual flush, and permit a pre-existing cistern to be replaced with one of the same volume — though a single flush cistern may not be replaced by a dual flush one. Byelaw 5 requires notice to Scottish Water before certain work, consent before beginning it, and compliance with any conditions. Northern Ireland has its own Water Supply (Water Fittings) Regulations, made in 2009.

Repair is usually the sane answer. Flush valves, siphon diaphragms, float valves, flush levers and cables, pan connectors and seals are consumable parts, and a WC that is sound in the pan and secure on the floor does not need replacing because its innards have worn out. In a hard water area those parts are simply on a shorter clock than elsewhere.

Replacement comes onto the table for different reasons: a cracked pan, a crazed or stained surface nothing will clean, a pan that cannot be made to sit firmly on an uneven floor, or a concealed cistern whose parts have been discontinued and cannot be matched. That last one is the modern trap. A concealed cistern behind tiling or a boxed-in frame is only as maintainable as its access panel, and a WC whose only service route involves breaking tiles is a different proposition from a close-coupled unit with the cistern in plain view.

If you are replacing rather than repairing, decide the style with the pipework in mind. Moving from a close-coupled WC to a wall-hung pan means a supporting frame and a different waste arrangement, which turns a one-hour job into a bathroom alteration. Where the room is below the level of the drain, the conversation changes again and becomes one about pumped drainage rather than about the WC.

The visit normally starts with the isolating valve and the cistern lid. Isolating the supply, then watching a full fill and flush cycle, separates the three possibilities quickly: water escaping past the flush valve into the pan, water failing to shut off at the float valve, or water arriving too slowly to give a full flush. From there most jobs are a part change and a test.

Where the pan will not clear, attention moves behind it. A WC that fills and empties slowly, or that gurgles when other appliances drain, is pointing at the branch or the drain rather than at the cistern, and clearing the pan repeatedly without looking further just books a return visit. A plumber who checks the nearest inspection chamber before blaming the WC is doing the job properly.

Two things are worth asking for at the end. First, that the cistern is filling to the marked line rather than above or below it. Second, that the pan is secure and the connector sound, since a rocking pan works its seal loose over months. LokalMatch is the route to the visit itself: describe the fault once — what the WC is doing, whether it is close-coupled or concealed, your postcode — and plumbers covering your area contact you. The pros pay for the requests they receive; LokalMatch does not do the repair, does not set the price, and does not vet, rank or recommend anyone.