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  • Ratflap stainless steel rat barrier 100mm Ratflap stainless steel rat barrier 100mm
  • ratflap in pipe ratflap in pipe

Ratflap Rat Blocker in Stainless Steel 4 "/100mm inc.

Quick Overview

Easy to fit
£98.40 Incl. VAT
How much will this cost to deliver?


  • Robust and long lasting
  • All Stainless Steel
  • Fits easily to clay or plastic pipes

The Ratflap does what traditional rat-control interventions do not: it stops the rats before they enter your workplace or home and prevents them from ever becoming a problem.
Rat traps and pesticides are designed only to work after the rats have arrived, after they've dragged filth, germs and disease into your world. In contrast, the Ratflap prohibits rats from ever encroaching on your work or home life by denying rats in their major thoroughfare: your water pipes and sewer system.
size chart
How the RATFLAP works:
The Ratflap works by blocking off sewage pipe access to rats from the outside while still permitting the free flow of water and waste from the inside.
The Ratflap fits snugly into your water or sewer pipe.
New barriers released late 2016 now have tabs (as shown on instructions provided)
Its steel flap opens when fluids need to flow freely into the sewer, but until then, the flap remains closed and prohibits rodents from entering. Quite simply, fluid flows out, but rats can't get in. This means that if you have multiple lateral drains only 1 rat-flap is necessary to protect them all!
The unit can be fitted in either the outlet pipe from your home (reverse the unit) or in the pipe between your home system and the main road sewer. If your home was built before 1960 the chances are that you will have an interceptor fitted on the pipe from your home to the main sewer and in this case you may only need a drain plug to solve your rat problem. Call us if you have an interceptor as rat barriers should not be fitted to rodding eye pipes, these should be protected with a rodding eye cap or a drain plug, we can advise on this.

In the datasheet tab there is a typical drain plan that will help locate where the ratflap will need to be installed, click below for installation instructions.

Installation Instructions
There is also a 6 inch version available in related products

Feefo Reviews - Average 95% (37 reviews)

Date Score Customer Comment Our Response
25-Apr-2018 Product:

No problems with ordering, delivery or fitting Many thanks for your order and feedback.
29-Nov-2017 Product:

Always Good quality products
10-Nov-2017 Product:

good what more can I say to many required letters
13-Sep-2017 Product:

Excellent product. Always use this type. Recommended
12-Aug-2017 Product:

Took around 1/2 hr to install and had good instructions. Only basic tools required (drill, pliers and screwdriver). Rat blaocker of good quality and being stainless steel will hopefully last well.
20-Jun-2017 Product:

The only rat flap to fit. Easy to fit and works.
14-Jun-2017 Product:

Well built reliable unit that always, if installed correctly, correct a drain rodent issue. We only use stainless steel as all others are inferior.
29-Apr-2017 Product:

Straightforward to fit. Good instructions. Let's see if it delivers the right result!
17-Apr-2017 Product:

Good product seems ideal to stop rats coming up sewer pipe. Bit dear for what it is. Well made from good quality metal. Did feel it should be priced closer to£50
29-Dec-2016 Product:

Good product. Quite expensive for what it is but it functions well.
30-Nov-2016 Product:

Solid product, hopefully will last years.
30-Nov-2016 Product:

Really good, could do with some discount though 😊
29-Nov-2016 Product:

31-Oct-2016 Product:

Easy to fit. Working so far!
05-Oct-2016 Product:

we are not the end user of the item.
27-Sep-2016 Product:

Appears to be operating trouble free after a couple of weeks but does seem a bit expensive for what it actually is. However, if it keeps the rats out it will be worth every penny!
31-Aug-2016 Product:

excellent service with quick delivery Great, thank you.
04-May-2016 Product:

Seems to work well, so far, although it seems expensive for what it is, this is a precision made item.
Glad I brought two - an immediate and complete and trouble free solution.
21-Apr-2016 Product:

20-Apr-2016 Product:

Easy to install and working well
Read more reviews on Feefo