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🚫 Keep rats out, peace of mind in — the ultimate drain defender!
The MF3 Rat Barrier Non-Return Valve is a 4-inch lift check valve designed for plastic or salt-glazed clay pipes. It installs easily on the exit pipe from your property’s drainage system to the street sewer, allowing wastewater to flow out while preventing rats and backflow from entering. Made from high-grade plastic, it offers a cost-effective, durable solution to vermin intrusion, with an optional stainless steel model for enhanced protection.
| Asin | B00PLN1UPA |
| Best Sellers Rank | 27,225 in Garden (See Top 100 in Garden) 4,091 in Pest Control Products |
| Brand | Multi-Flap |
| Connector Type | Sweat, Socket Weld |
| Customer Reviews | 3.7 3.7 out of 5 stars (108) 3.7 out of 5 stars |
| Exterior Finish | Plastic |
| Inlet Connection Size | 4 Inches |
| Inlet Connection Type | Socket Weld |
| Manufacturer | Multi-Flap |
| Material | Plastic, Stainless Steel |
| Model Number | MF3 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Number Of Pieces | 1 |
| Number Of Ports | 1 |
| Outlet Connection Size | 4 Inches |
| Outlet Connection Type | Sweat |
| Part Number | MF3 |
| Set Name | Rat Barrier |
| Size | 4 inches |
| Thread Size | 4 inches |
| Thread Type | Non-threaded |
| Unit Count | 1.0 count |
| Upc | 609788764618 |
| Valve Type | Lift Check Valve |
User
Great value product.
Bought these a couple of years ago. Easy to fit and no problems with them at all. A lot less expensive than metal ones and seem to last.
User
The door is sprung with just the right amount of tension to close tight once waste or water has passed through
For ease of fitting it's a 5 star product, once I had chipped away a small section of benching in the sewer it slotted in and worked perfectly. The door is sprung with just the right amount of tension to close tight once waste or water has passed through, which it does without issue. Time will tell if the filthy, horrible things are getting in via the drains but already activity seems to of dropped off meaning there may just be the odd one that needs to leave and shut the door on the way out. Providing the door spring is stainless steel and they don't chew through the plastic/polyprop door itself it appears well made and should last.
User
Broke whilst being fitted! So useless and a waste of money for a bit of plastic!!!!
My husband attempted to fit following the instructions but the flap broke whilst he was putting the valve into the pipe. Totally useless and clearly was either faulty or just not fit for purpose.To top it all, I cannot return the item as it has been down the sewer!!!I am very unhappy about wasting £25 on a piece of plastic that has not served its purpose and am certainly not wasting another £25.
User
Rat prevent
It was easy to fit just remember to put some soapy water on it to make it easier to fit working fine since I installed it
User
no seal
would have expected a rubber seal. we need it for water not rats. so disappointed will try it and see if it works
User
Just the job.
In and working great.
User
works well
It does exactly what I wanted it for.
User
Installed correctly. However after 3 days found it had ...
Installed correctly. However after 3 days found it had blocked the drain as toilet paper and fecal matter was trapped. Took it out and binned it.
Trustpilot
2 weeks ago
1 month ago