Common Causes of Blocked Drains in Peterborough Homes

Why Peterborough Drains Block — and What to Do About It

Most blocked drains don't happen overnight. They build up gradually over weeks or months until water stops flowing freely. The earlier you catch the signs, the simpler and cheaper the fix. Left too long, a blockage can lead to sewage backing up, damp in walls, and cracked pipes — all of which cost significantly more to put right.

Fat, Oil, and Grease

The most common cause of blocked kitchen drains is fat poured down the sink. When it cools in the pipe, it solidifies and sticks to the pipe wall, gradually narrowing the bore. The fix is simple: let fat cool and dispose of it in the bin. If grease has already built up, a professional drain jetting service can clear it quickly.

Hair and Soap Scum

In bathrooms, hair is the primary culprit. Mixed with soap scum, it forms a fibrous mat that catches everything else passing through. A drain cover costs less than £5 and prevents the problem entirely. If the drain is already slow, a plunger or flexible drain snake can usually clear it without needing a plumber.

Wet Wipes and Sanitary Products

Despite "flushable" labelling, wet wipes, cotton buds, and sanitary items do not break down in water. They accumulate in the sewer, combine with grease, and cause serious blockages far enough down the pipe that DIY clearing won't reach. None of these should be flushed — full stop.

Tree Roots

Older Peterborough properties — particularly Victorian and Edwardian terraces — often have original clay drainage pipes that are now over a century old. Tree roots are drawn to moisture and can penetrate even hairline cracks. Once inside, they grow rapidly and can collapse the pipe entirely. Root intrusion is usually identified with a CCTV drain survey and treated with root cutting followed by pipe relining.

Limescale Build-Up

Peterborough is in a hard water area, which means limescale forms in pipework over time — particularly in hot water pipes. While it rarely causes complete blockages on its own, it narrows the pipe bore and makes other blockages worse. Regular central heating servicing and descaling keeps the system flowing freely.

Collapsed or Displaced Pipes

In older properties, clay or pitch fibre pipes can collapse or sag due to ground movement or age. Water pools in the low point and collects debris. If your drain keeps blocking despite being cleared, a structural problem is likely — clearing alone won't fix it. A check for the signs of a deeper blockage will tell you whether you're dealing with a pipe problem.

When to Call a Drain Specialist

Try a plunger and boiling water for a simple sink blockage. If it doesn't clear after two attempts, or if multiple drains in the house are slow at the same time, call a professional. Multiple slow drains together indicate a blockage in the shared main drain — not something you can clear with a plunger. Call us on 02039514510 or book online and we'll clear it the same day where possible.