Pest Control

How Do Rats Get In Through Drains?

Rats are excellent swimmers and can travel through drain pipes with ease. The UK sewer system is home to a large rat population, and they are constantly looking for access routes into properties — particularly in search of food, warmth, and nesting sites. The most common entry routes are:

• Cracked or fractured drain pipes — even a small crack is enough for a rat to squeeze through
• Open or displaced pipe joints — common in older clay drainage systems
• Broken inspection chambers and manholes — damaged covers or cracked chamber walls
• Poorly sealed pipe connections — gaps around pipes where they enter the building
• Collapsed pipe sections — providing direct access from the sewer to the ground beneath the property
• Open-ended pipes — drain pipes that terminate without a proper sealed end cap

Once inside the drainage system, rats can access properties through toilet pans (yes, really — it's more common than you'd think), broken pipe ends under floors, or gaps around pipework where it passes through walls and floors. A CCTV drain survey will identify exactly how they're getting in.

Signs That Rats Are Entering Through Your Drains

If you're experiencing a rat problem, look out for these signs that drains may be the entry route:

• Rat droppings near drain covers, inspection chambers, or manholes
• Scratching or scurrying sounds from under floors or inside walls — particularly near drainage runs
• Rats appearing near drain covers or in the garden close to drainage access points
• A rat appearing in a toilet — a clear sign they're travelling through the drainage system
• Gnaw marks on pipework or around pipe entry points
• Burrows in the garden close to drain runs or inspection chambers
• Persistent rat problems despite repeated pest treatment — a sign the entry route hasn't been sealed

Why Fixing the Drain Is Essential for a Permanent Solution

Many people call a pest control company when they have a rat problem — and pest treatment is certainly part of the solution. But if the drain defect that's providing access isn't repaired, rats will continue to enter the property through the same route. You may clear the current infestation, only to find new rats appearing weeks or months later.

By combining drain repair with pest treatment, we address both the symptom (the infestation) and the cause (the entry route). Once the drain defect is repaired — whether by patch lining, relining, or excavation — the access route is permanently sealed, and rats cannot re-enter through the same point.

We work alongside pest control specialists and can coordinate a fully integrated approach to ensure both the drain defect and the infestation are dealt with effectively and permanently. Call us on 07958 784011 to discuss your situation.