Burst pipe repair that lasts: cut out the failure, renew the section, test it in Kenilworth

Why pipes split in the first place

Copper fails from the inside out. Corrosion thins the wall until the pressure finds a weak point, often at a bend or just downstream of a soldered elbow where the pipe was overheated during installation. Plastic pipe fails differently: it becomes brittle with age and sunlight, and cracks at a fitting where an insert was left out or the pipe was not pushed fully home. Mechanical damage is common too, a nail through a floorboard, a pipe crushed against a joist, a compression nut overtightened until the olive split the tube. Freezing remains the classic cause in unheated spaces. In almost every case the failure has been developing quietly, which is why the repair needs to deal with the condition of the pipe, not only the hole.

Why a quick patch usually comes back

A rubber clamp or a resin bandage spreads load over a small area and relies on the pipe wall holding. On corroded copper the wall is thinnest right where the split is, so the clamp sits on the weakest part of the run and the next failure is often within a few centimetres. Tape and sealant do not cope with mains pressure and will weep again once the system is hot. Patching also leaves the original fault in place: an unsupported span still flexes, a badly aligned joint still strains, and a pipe that froze once will freeze again. The result is a second call-out, a second lot of water, and often a bigger opening in the fabric of the building.

How we assess the repair

We start by identifying the pipe's material, diameter and what it serves, because that decides the fittings we use. Then we check the condition of the pipe either side of the failure: scraping back copper to bright metal shows whether the wall is still sound, and flexing plastic shows whether it has gone brittle. We look at support and alignment, at how the pipe passes through joists or walls, and at whether earlier repairs are nearby. On concealed runs we confirm the extent of the damage before cutting, so the opening in plaster or flooring is only as large as the work requires. You get a clear recommendation: a local section replacement, a longer renewal, or occasionally a joint remake where nothing else has failed.

How the repair is carried out

The supply is isolated and the section drained. We cut back to clean, sound pipe on both sides of the split and remove any old joint or repair within that span. The new length goes in with the correct fittings for the material: soldered or press-fit for copper, manufacturer's fittings with inserts for plastic, and a proper coupling rather than a reducer where sizes differ. The pipe is clipped and supported so it is not carrying its own weight across a gap, and any sleeve through masonry is renewed. Then the section is pressure tested, the supply restored slowly, and every joint checked with the system at working pressure and, on heating circuits, at temperature. We run the nearby taps and appliances to confirm flow, and leave the area dry.

Reducing the chance of a repeat

Lag pipes in cold spaces and draught-proof where they enter the building. Keep loft insulation over the pipes rather than under them, and do not block the gaps that let warm air reach them. Avoid hanging anything from pipework and never use a pipe as an earth. If a run has been repaired more than once, budget for renewing the whole leg rather than another patch. Keep the stopcock working, and if the property has very high mains pressure, fit a regulator. Where pipework is old and thin, a planned replacement of the worst runs costs far less than repeated escapes.

When to call us

Call if the pipe is still leaking after a temporary repair, if the split is on a supply pipe rather than a waste, if the pipe is copper and feels thin or shows green crusting, or if the failure is in a wall, ceiling or solid floor. Also call if you have had more than one burst on the same run in a few years; that pattern usually means the pipework needs renewing rather than repairing. A leaking waste pipe under a sink can be a booked visit; a pressurised supply pipe cannot.

Book a call-out

Tell us the pipe material if you know it, where the split is and whether the water is isolated. Our engineer will confirm the burst pipe repair approach and the price before starting work. Book a visit and we will repair the pipe on the day wherever the parts allow.