10 Best Rat Blocker For Drains 6 Inch in The UK

Last updated on 31/08/2025

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Best Choice

9.7

Exceptional

RATFLAP

The Ratflap Stainless Steel Rat Prevention Fast 6" - 150mm Clay or Plastic Drain Pipe

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Why We Love It

Easy retrofitting for any pipe.
Stops rats without hindering flow.
Durable stainless steel construction.

Main Highlights

RATFLAP 6inch/150mm, RATFLAP can be retrofitted into old, plastic or clay pipes and new pipe systems too
RATFLAP can be placed into the upstream or downstream positions depending on your sewer flow layout.
RATFLAP is designed to stop rats in their tracks, while not affecting the flow of the sewer.
Made entirely from 304 grade stainless steel and precision cut by laser meaning RATFLAP will last for decades.
Taking years of development the device is designed to be a simple "fit & forget" solution and can be fitted by almost anyone although a basic knowledge of sewer flow and layout is recommended.

6" Rat Flap Blocker, Drain proofing

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Why We Love It

Durable and weather-resistant.
Prevents rodent infestations effectively.
Easy to install.

Main Highlights

Stainless Steel
Rat Barrier

Metex - Ratwall for 150mm/6" Pipe. Made from Robust, Corrosion Resistant Stainless Steel with A One Way Valve & Flap. This Rat Blocker for Drains is Easy to Install by Hand Or at Street Level

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Why We Love It

Prevents rats in drains.
Easy installation by hand.
Non-toxic rodent control.

Main Highlights

STOP RATS TRAVELLING THROUGH DRAINS: One of the primary ingress points for rats into a domestic or commercial property is via the drainage system, either directly from the main sewers or a collapse within the pipe. A Rat blocker is installed within the inspection chamber to stop rats movement upstream. By installing a Rat Blocker all up stream branches are protected.
ONE-WAY FLAP PREVENTION: The Metex Ratwall allows liquids and solid waste to pass down the system whilst preventing access to rats moving upstream. The rats cannot pass or chew through the barrier flap, thus preventing their access to re-infest.
EASY TO INSTALL PROTECTION: This Rat Blocker compresses and expands for easy, frictionless installation and a secure fit. Can be installed by hand or from street level with a separately available installation pole. Suitable for domestic use in plastic, clay and cast iron drains. Features an external hinge that enables maximum waste flow.
RATWALL RAT BLOCKER: This listing is for a 6" / 150mm version. The rat wall can be installed into 100mm Victorian drains. Instructions are included, and we also offer a support video to help with installation. We also have installation instructions for with or without an installation pole. A 4" / 110mm variant is also available.
METEX: We specialise in non-toxic rodent control equipment including our Nordisk and Ratwall rat valves as well as RatTape proofing tape. We are a UK business that designs and manufactures innovative products for construction professionals and the DIY market, working with manufacturers both in the UK and overseas.

Mastertrap Rat Drain Guard Blocker Single Flap Stainless Steel 6" / 150mm

Main Highlights

Made from heavy duty grade stainless steel.

Metex - Nordisk 150mm Rat Blocker. Made From Marine Grade Acid Resistant Stainless Steel With A One Way Valve & Two Serrated Flaps For Double Protection. Easy To Install Industrial Rat Valve.

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Why We Love It

Stops rats via drains.
Double-flap ensures double protection.
WRC & VA Approved.

Main Highlights

STOP RATS TRAVELLING THROUGH DRAINS: One of the primary ingress points for rats into a domestic or commercial property is via the drainage system, either directly from the main sewers or a collapse within the pipe. A Rat blocker is installed within the inspection chamber to stop rats movement upstream. By installing a Rat Blocker all upstream branches are protected.
DOUBLE PROTECTION: The Metex Ratwall has two sharp serrated flaps for double protection from rat infestations. This also allows liquids and solid waste to pass down the system whilst preventing access to rats moving upstream. The rats cannot pass or chew through the barrier flap, thus preventing their access to re-infest. All models of the Nordisk TX11 Rat Blocker are supplied with reversible flaps so that the same unit can be used in either inlet or outlet pipes.
WRC & VA APPROVED: The only UK rat blocker to achieve Water Research Centre Approval, the benchmark in UK water industry. The Nordisk rat blocker has also passed the stringent VA Approval issued by the Danish certification body, ETA-Denmark, and inspected by the Danish Technological Institute.
PROVEN PROFESSIONAL RAT BLOCKER: Over 250K units installed worldwide, this rat flap is proven in professional pest control use over 10 years and used in 1 in 6 Danish homes. All parts of the rat valve are made of marine grade 316 acid-resistant stainless steel for demanding environments. Unique patented design with expanding sides allows the rat valve to slide into the drain without friction. Easy to adjust for drain inlet or outlet positions
METEX: We specialise in non-toxic rodent control equipment including our Nordisk and Ratwall rat valves as well as RatTape proofing tape. We are a UK business that designs and manufactures innovative products for construction professionals and the DIY market, working with manufacturers both in the UK and overseas.

Rat Blockers for Drains - for 6 inch Drains (145/150mm) - Non-Return Valve, Twin Flaps (Pack of 1)

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Why We Love It

Double non-return valves feature.
Permanent rat entry solution.
Rust and gnaw resistant.

Main Highlights

DOUBLE NON-RETURN Valves: Allowing Free Flow Drainage but Prevents Rat Entry. Please note: other cheaper alternatives only have 1 single valve which offers less protection
PERMANENT RAT ENTRY SOLUTION: Our rat blocker is an immediate and permanent solution to stop the entry of rat/rodents
RUST & GNAW RESISTANT: Created From Stainless Steel, Rust & Gnaw Resistant
12 MONTHS MANUFACTURE'S WARRANTY: Guaranteed Product Quality for Long Lasting Protection for Your Home and Drainage System
SUITABLE FOR CLAY & PLASTIC DRAINS: Our rat blockers can fit in both clay and plastic-type pipes in 6″ size. Flexible Fitting for Drain Sizes (145/150mm)

Rat Blockers Stainless Steel for Drains - Twin Steel Valves, 6-inch Rat Flap, Non-Return Valve, Shorter Design for Curved Fittings

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Why We Love It

Immediate and permanent solution.
Fits clay and plastic pipes.
Rust and gnaw resistant.

Main Highlights

PERMANENT RAT ENTRY SOLUTION: Our rat blocker is an immediate and permanent solution to stop the entry of rat/rodents
SUITABLE FOR CLAY & PLASTIC DRAINS: Our rat blockers can fit in both clay and plastic-type pipes in 6″ size.
TWIN NON-RETURN VALVES: Twin Valves, Allowing Free Flow but Also Blocks Rat Entry
RUST & GNAW RESISTANT: Created From High Performance Stainless Steel, Rust & Gnaw Resistant
12 MONTHS MANUFACTURE'S WARRANTY: Guaranteed Product Quality for Long Lasting Protection for Your Home and Drainage System

Pest Interceptors 6 Inch Rat Flap for Sewer Pipes, Rodent Blocker, One Way Valve, Stops Rats Entering via Drainage Pipes, Rat Prevention, Stainless Steel, 150mm 6" diameter

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Why We Love It

Rats leave forever behind.
Unmatched quality, always effective.
Easy and quick installation.

Main Highlights

PEST INTERCEPTORS - We only use this Rat Flap! This one way Rat Valve means that rats can leave your home, through a broken or badly fitted drainage pipe on their way to the sewer for their food, never to return again! For use in drainage pipes to stop rats getting from the sewer via drainage into your home.
UNRIVALLED QUALITY - There are so many on the market that look similar but more 'advanced' or 'technical' and we have tried them all over the past 15 years of solving long term rat infestations! This is the only flap that we have found that works every time
STAINLESS STEEL - This heavy duty rat blocker made from 316 stainless steel is perfect for keeping unwanted pests out of your house that are escaping the sewer sewer system.
EASY TO INSTALL - No experience is needed. Can be installed at the entrance or exit of the pipe. No long-term maintenance needed.

RatGate Rodent Prevention System

RatGate: 4" (110mm) stainless steel rat flap/barrier/blocker for clay, plastic and cast iron drainage pipes! Keep rats out of your property!

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Why We Love It

Easy and quick installation.
Keeps rats out effectively.
Environmentally friendly and humane.

Main Highlights

The only product on the market that allows you to lift the flap from the top of the manhole - a crucial feature for drain maintenance
KEEP RATS OUT OF YOUR PROPERTY
EASY TO INSTALL - Only basic tools are required to install a RatGate.
ACCESSIBLE - The RatGate includes a liftable flap mechanism, providing easy access for drain maintenance.
TOUGH CONSTRUCTION - Made from high grade laser cut stainless steel.
MAINTENANCE FREE - Once the device is installed there is no maintenance required other than a periodic check.
ENVIRONMENTALLY FRIENDLY - The device is humane, poison free and environmentally friendly.

Metex - Ratwall For 110mm/4" Pipe. Made From Robust, Corrosion Resistant Stainless Steel With A One Way Valve & Flap. This Rat Blocker For Drains Is Easy To Install By Hand Or At Street Level

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Why We Love It

Stops rats through drainage system.
Prevents rats' upward movement.
Simple, secure installation process.

Main Highlights

STOP RATS TRAVELLING THROUGH DRAINS: One of the primary ingress points for rats into a domestic or commercial property is via the drainage system, either directly from the main sewers or a collapse within the pipe. A Rat blocker is installed within the inspection chamber to stop rats movement upstream. By installing a Rat Blocker all upstream branches are protected.
ONE-WAY FLAP PREVENTION: The Metex Ratwall allows liquids and solid waste to pass down the system whilst preventing access to rats moving upstream. The rats cannot pass or chew through the barrier flap, thus preventing their access to re-infest.
EASY TO INSTALL PROTECTION: This Rat Blocker compresses and expands for easy, frictionless installation and a secure fit. Can be installed by hand or from street level with a separately available installation pole. Suitable for domestic use in plastic, clay and cast iron drains. Features an external hinge that enables maximum waste flow.
RATWALL RAT BLOCKER: This listing is for a 4" / 110mm version. The rat wall can be installed into 100mm Victorian drains. Instructions are included, and we also offer a support video to help with installation. We also have installation instructions for with or without an installation pole. A 6" / 150mm variant is also available.
METEX: We specialise in non-toxic rodent control equipment including our Nordisk and Ratwall rat valves as well as RatTape proofing tape. We are a UK business that designs and manufactures innovative products for construction professionals and the DIY market, working with manufacturers both in the UK and overseas.

8.7

Excellent

We scanned 1380 products

We reviewed these offers relevant to the Rat Blocker For Drains 6 Inch within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like RATFLAP, Ratflap, Ratwall, MASTERTRAP, Metex, Rat Blockers, Pest Interceptors, RatGate Rodent Prevention System, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Rat Blocker For Drains 6 Inch in the market, we considered we took a deep dive into 6901 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is The Ratflap Stainless Steel Rat Prevention Fast 6" - 150mm Clay or Plastic Drain Pipe. We love many things about this product by RATFLAP. What sets it apart from the competition is Easy retrofitting for any pipe. , Stops rats without hindering flow. , Durable stainless steel construction. .
The best value product for most shoppers and where user satisfaction is continuously the highest is 6" Rat Flap Blocker, Drain proofing by Ratflap based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Rat Blocker For Drains 6 Inch and the best cost-to-value ratio is Metex - Ratwall For 110mm/4" Pipe. Made From Robust, Corrosion Resistant Stainless Steel With A One Way Valve & Flap. This Rat Blocker For Drains Is Easy To Install By Hand Or At Street Levelat Ratwall with a % discount.
Our list of the best Rat Blocker For Drains 6 Inch is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Rat Blocker For Drains 6 Inch in The UK

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We scanned 1380 products

We concluded that: