Hearing scratching beneath the floor, finding droppings near a kitchen or bathroom, or seeing rat activity return after treatment can leave you wondering where they are getting in. In many UK homes, the drainage system is one possible route where pipework is damaged or poorly sealed.
So, when discussing how rats commonly get into drains, we often see that it comes down to access. Rats can travel through sewer networks and move into private drainage through an opening. The key is finding the route rather than assuming the drains are responsible.
Concerned rats may be using your drains?
If the signs keep returning, a CCTV drain survey can show what is happening inside the pipework before any repair or rat gate is recommended. Our engineers inspect the drain, so the next step is based on evidence. Call 0800 999 1769 or 0203 337 0349, or email info@bndrainageltd.com.
How rats get into drains and reach a property
Rats entering sewer pipes do not automatically mean there is a fault at your home. The problem starts when they can move from the sewer into private drainage and then find a way out.
Common drain entry points for rodents include cracked pipes, displaced joints, open or redundant branches and damaged inspection chambers. Building Regulations guidance for England recognises that defective or disused drainage can harbour rats and describes measures such as one-way valves and fixed covers.
An old toilet, extension or changed drain run may also leave unused pipework connected below ground. If it has not been sealed properly, it can create a hidden route.
Stopping the rat you can see is only part of the job. If the drainage route stays open, another rat may be able to use the same access point.
What signs suggest the drains could be the route?
A rat sighting cannot tell you how the animal entered. The pattern of activity is more useful.
Investigate the drainage if droppings or noises keep returning around kitchens, bathrooms or floor voids, especially after pest treatment. Slow drainage or problems around an inspection chamber may add to the picture.
How a CCTV drain survey helps find rat entry points
A CCTV survey lets an engineer inspect the inside of the drain using a camera. It can identify cracks, fractured pipework, displaced joints, blockages and potential pest entry points hidden from view.
For a recurring problem, this can be more useful than fitting a barrier immediately. Our CCTV surveys provide a written record, images and recommendations to guide the next step. BN Drainage already uses CCTV surveys to identify pest entry points, structural damage and other hidden drainage defects.
How to prevent rats entering drains in the UK
The right solution depends on what the inspection finds. There is no single device that suits every property.
If the drain is damaged, repairing the pipe may be the priority. Cracks, displaced sections or redundant connections need attention rather than simply being hidden behind a barrier. Our drain repair service covers damaged pipework, lining and replacement where appropriate.
A rat gate can help when rats travel from the sewer towards the property through a suitable drain run. It is a one-way barrier that allows wastewater to flow out while restricting rats from moving back towards the house. Position, pipe condition and routine checks all matter.
To prevent rats getting into drains, think in stages: identify the route, deal with any active infestation, repair defects where needed and add suitable proofing.
Choosing the right next step for a recurring rat problem
If activity returns after treatment or centres around drainage-connected parts of the house, investigating below ground becomes more relevant.
At BN Drainage, we can combine drainage investigation with blocked drain clearance, drain repairs and rat-gate advice where appropriate. Our team has more than 40 years of combined drainage experience and holds CHAS and Constructionline Gold accreditations.
Stop the route, not just the symptom
Rats can use drains as a hidden route into UK homes, but the useful question is whether your private drainage gives them a way towards the property.
Finding that route first makes the next step clearer. A CCTV survey may show a repair is needed, a rat gate is suitable, or that the drainage is not the source.
Need help finding the entry route?
If you suspect rats are using your drains, call BN Drainage on 0800 999 1769 or 0203 337 0349, or email info@bndrainageltd.com. We can inspect the drainage and explain whether a CCTV survey, repair or rat gate is the sensible next step.
Frequently asked questions
Can rats come up through a toilet?
Yes, it is possible. Rats can move through drainage systems, so a toilet may become an exit point if the pipework allows it.
Can rats get through damaged drain pipes?
Yes. Cracked pipes, displaced joints and poorly sealed or redundant connections can create routes towards a property.
Will a rat gate stop rats getting into my home?
It can stop rats using a particular drain route when it is suitable and correctly positioned. It will not stop separate entry points elsewhere.
Do I need a CCTV survey if I already know I have rats?
Not always, but it is useful when you suspect the drainage system or the problem keeps returning.
Should a damaged drain be repaired before fitting a rat gate?
Often, yes. If the defect is creating the access route, repairing it may be more important than adding a barrier.
