Rat Blockers & Non-Return Valves
A rat blocker is a one-way valve fitted inside your drain. Waste water flows out as normal, but rats can’t get back up into your property’s drainage.
When a Rat Blocker Helps
Early identification helps prevent larger problems. Common signs include:
Recurring Rats
Rats keep returning from the sewer
Sewer Connections
Properties on older or busy sewer lines
Hard-to-Repair Defects
Defects deep under buildings
After Repairs
Extra protection after a repair
Commercial Sites
Food premises needing extra protection
Rat blockers are one of the most effective ways to stop rats travelling from the sewer into a property, especially where the exact defect is hard to repair.
They’re fitted from an inspection chamber, usually without any digging, and work alongside repairs and proofing.
How Rat Blockers Work
The valve has a flap that opens with the flow of water and closes behind it.
A rat blocker:
- Lets waste water flow out normally
- Closes against rats trying to enter
- Is usually fitted in the inspection chamber
- Can be removed for maintenance
The fitting position is decided from the CCTV survey.
Choosing the Right Position
A rat blocker only protects the drainage upstream of where it’s fitted.
We consider:
- Where rats are entering from
- Which runs need protecting
- Access for future maintenance
- Pipe size and condition
A survey first makes sure the blocker goes in the right place.
Part of a Complete Solution
Rat blockers work best alongside other repairs.
Often combined with:
- Patch lining over defects
- Capping redundant connections
- External rodent proofing
- Monitoring
Together, these give the best chance of stopping rats for good.
Our Rat Blocker Process
1
Survey
CCTV survey to plan the position.
2
Clean
Jet the run if needed.
3
Fit
Install the non-return valve.
4
Test
Check the flow and seal.
5
Monitor
Confirm rat activity has stopped.
Why Choose TTOCS for Rat Blockers?
- Pest control and drainage under one roof
- Rodent-focused CCTV drain surveys
- Repairs carried out by the same team
- No-dig options wherever possible
- Clear findings and honest recommendations
- Fully insured with a waste carrier licence
- Covering Warrington and the surrounding areas
Competitive pricing
We are committed to delivering effective pest control solutions with minimal disruption.
Targeted Pest Control Solutions
Rodents, insects, wasps, wildlife and drainage, handled by one local specialist from inspection to proofing
Drainage Solutions
Professional drainage solutions
Rats in Drains
Find and fix the drain route
CCTV Drain Surveys
Camera inspection of drains
Drain Patch Lining
No-dig rat patch repairs
Drain Repairs
Excavation, rest bends and joints
Rats Coming Up Through Drains?
Stop the problem at source
Frequently Asked Questions
What is a rat blocker?
A non-return valve fitted inside a drain that lets water out but stops rats coming back in.
Will a rat blocker cause blockages?
A correctly fitted blocker allows normal flow, and it can be removed for maintenance if needed.
Do I need a survey first?
Yes. The survey confirms where rats are coming from and where the blocker should go.
Can rat blockers be fitted in commercial drains?
Yes. They’re suitable for homes and commercial premises.
Is digging needed?
Usually not. Most are fitted from an existing inspection chamber.
Get a Rat Blocker Fitted
Contact TTOCS Pest Control to arrange a survey and rat blocker installation in Warrington.
Contact Information
Call Us
+44 7379 606965
ttocspestcontrol@gmail.com
Service Area
Warrington & Surrounding Areas
Availability
24/7 Emergency Service
Professional Credentials
NPTA Member
National Pest Technician Association
British Pest Register
CPD Scheme
Waste Carrier License
Fully Compliant
Fully Insured
Public Liability Coverage
We’ll respond within 24 hours. For urgent issues, please call us directly.