Home › Blocked drains
The most useful thing you can do about a blockage is work out where it is. Every sensible next step follows from that one answer.
The direct answer: check whether the problem is one fixture or several. One slow sink is a local blockage you may clear with a plunger; several fixtures backing up together means the blockage is in the main drain, and rodding equipment or a camera is the right tool. For that, call 020 4577 2888 to be connected with a local plumber — and in the meantime, stop putting water down.
Run a little water at each fixture and watch what happens. The pattern of what backs up, and where, maps the blockage for you before anyone lifts a floorboard or a manhole cover.
For a single slow fixture, the honest toolkit is short and mechanical.
Most main-drain blockages are built gradually, at home, from a familiar list. Fat, oil and grease set solid as they cool in the pipe — pour them into a container and bin them instead. Wipes, including the ones sold as flushable, do not break down the way paper does; nor do cotton wool, sanitary products or kitchen roll. Coffee grounds and food scraps bind with grease into exactly the kind of plug that resists a plunger. None of this is novel advice, and all of it is cheaper than a rodding visit.
Local geography adds two wrinkles worth knowing. First, drainage age tracks housing age: an older terrace near the town centre may drain through pipework laid generations ago, with the joints and gradients of its era, while a modern estate in the commuter belt runs newer plastic at engineered falls — so the same symptom can have a different cause street by street, and it helps to mention your property's rough age when you call. Second, on low-lying ground near the canals and the Forth, heavy rain can load the surface-water side of the system; gullies that gurgle or pool briefly after a downpour are worth mentioning too, since they can mimic — or mask — a genuine blockage on your own run.
Check the other plugholes. If only one sink or shower is slow, the blockage is local to that fixture and often within reach. If several fixtures gurgle or back up together — especially the lowest ones in the house — the problem is further down the shared pipework or the main drain, which is a job for proper equipment.
Broadly, the drain serving only your property is your responsibility, while the shared public sewer beyond it is Scottish Water's. If neighbouring homes are backing up at the same time as yours, that points to the public side and is worth reporting to Scottish Water. Boundaries can be complicated, so a plumber or drainage engineer can help establish where the blockage sits.
Use caution. Caustic products can turn a soft blockage into a hardened plug, damage older pipework, and sit in the pipe as a hazard for whoever rods it afterwards. A plunger, a hand auger and patience are safer first steps — if those fail, stop and call rather than escalating the chemistry.
Do not flush again. Another flush adds several litres to a bowl that has nowhere to send them. Wait: if the level falls slowly there is a partial blockage a plunger may shift. If it does not fall, or other fixtures are backing up too, leave it and call — that pattern suggests the blockage is beyond the toilet itself.
The main page — how the line works and the areas covered.
Go to home →Stopcock, taps, electrics — the sequence, in order.
Read the guide →Gauge readings, lockouts, no hot water — and gas safety.
Read the guide →How pricing is structured and what to ask before work starts.
Read the guide →Pressure, clock, power — the checks that find most causes.
Read the guide →Gentle thawing from the tap end back — and prevention.
Read the guide →Damp patches, dropping pressure — the test that settles it.
Read the guide →Call any hour to be connected with a local plumber covering Falkirk, Grangemouth, Larbert and the surrounding towns.
Call now