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🚪 Shut the door on pests—secure your drains with ease!
The MF3 Rat Barrier Non-Return Valve is a high-grade plastic, 4-inch lift check valve designed for easy, no-plumber installation on clay, plastic, or cast drain pipes. It prevents rodent and snake ingress by sealing the drain outlet immediately after wastewater passes, while also reducing backflow and blocking light that attracts pests. Ideal for protecting multiple toilets with a single valve, it offers a cost-effective, durable solution to keep your drainage system pest-free.
| ASIN | B00PLN1UPA |
| Best Sellers Rank | 90,155 in Garden ( See Top 100 in Garden ) 8,367 in Pest Control Products |
| Brand | Multi-Flap |
| Connector Type | Sweat, Socket Weld |
| Customer Reviews | 3.6 3.6 out of 5 stars (107) |
| 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 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 |
| UPC | 609788764618 |
| Unit Count | 1.0 count |
| Valve Type | Lift Check Valve |
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