1 / 7Rat Blockers Stainless Steel Drain Rat Valve, 100–110 mm, Pack of 2
Rat Blockers’ stainless steel drain rat valve is listed as a two-pack for blocking rodent access through drainage pipes while allowing wastewater to flow out. Its claimed flexible fitting is intended for 100–110 mm pipework, so confirm the actual pipe and installation location before buying.
At a glance
- The listing describes a non-return flap intended to let wastewater flow out while hindering rodent entry from drains.
- Stainless steel construction and a flexible rubber fitting seal are claimed. The listing says it suits standard UK 110 mm drainage pipes.
- The listing describes two non-return valves and says installation is by insertion into a drain pipe or inspection chamber.
Often bought together
Pros and cons
Pros
- A passive drain barrier is presented as an alternative to chemical baits or traps, with no bait replenishment described.
- The flexible seal is intended to help position the unit in a compatible pipe.
- Customer feedback reports positive experiences with ease of installation and use.
Cons
- The stated purchase price may be a drawback for buyers who consider it expensive. Customer feedback is mixed on value.
Technical specifications
3 specifications| Brand | Rat Blockers |
|---|---|
| Material | Stainless Steel |
| Dimensions listed | 10 x 10 x 13 cm; 950 g |
|---|
What to know before buying
Listing details to confirm
The size descriptions are not fully consistent: the title says 100mm-110mm, while the feature text specifies standard UK 110mm pipes. The listing also calls this a pack of 2 but describes a single unit in the product details, and its model name appears as both “Rat Bloacker” and “Rat Blocker”. Confirm the selected listing’s quantity and compatibility with your pipe before ordering. The claimed pest-blocking performance and fit are not independently verified.
Who is it for?
A good fit for
- People seeking a passive rodent barrier for a compatible drain or inspection chamber.
- Buyers whose pipe dimensions and installation position match the listing’s claimed fitting range.
Less suited to
- Anyone needing a confirmed fit for a pipe outside the stated 100–110 mm range.
- Buyers who require independently confirmed pest-blocking performance or installation compatibility.

Customer reviews on Amazon
- 5 stars
84% 84% - 4 stars
10% 10% - 3 stars
3% 3% - 2 stars
0% 0% - 1 star
3% 3%
Customer feedback reports that buyers find the blocker effective at preventing pests and straightforward to install and use, with positive comments about quality and simple design. Value opinions are mixed, with some considering it worthwhile and others finding it expensive. These reported experiences may matter to buyers seeking a passive drain barrier, but they do not confirm fit for a particular pipe or establish the listing’s performance claims.
Positive themes
- Customers report easy installation and use.
- Customers give positive feedback on quality and simple design.
- Customers report that it helps prevent pests.
Negative themes
- Some customers consider it very expensive.
Mixed feedback
- Opinions on value for money differ.
Frequently asked questions
What pipe size is this rat blocker listed for?
The title states 100–110 mm, while the feature text specifies standard UK 110 mm drainage pipes. Check your pipe measurement and the selected listing before purchase.
How is it intended to work?
The listing describes a non-return flap that permits wastewater to flow out and is intended to hinder rodents entering through the drain. This performance claim is not independently verified.
Does the listing confirm that two units are included?
The title says pack of 2, but the details do not clearly confirm the package quantity. Check the selected listing before ordering.

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