2Pcs Rats & Mice Prevention for Drains, Heavy Duty Rat Gate for Sewers, Stainless Steel Drain Guard for Rodent Control with Non-Return Valve, fits drains(95-110mm, 4 inch) for Outdoor, Basement

• 【Block Rat Entry Through Drains】Are you still worried about mice in your home? Do you have headaches because mice keep finding their way into your home through drains or vents? Do you want to get rid of the rat problem in your home for good? Then you can consider this Rat Drain Guard, which can solve this problem very well!
• 【One-Way Stainless Steel Flap Design】 Built with a durable one-way mechanism, this rat gate allows water and waste to pass through while completely blocking rodents from climbing upstream. Rats can’t chew through the marine-grade steel flap—ensuring long-term protection.
• 【Easy To Install And Maintain】 Drain guards require no previous experience with installation and, once installed, needs no long-term maintenance. Drain guards can be installed either at the entrance or exit of the pipe, and the included bolt can be switched to match the flow direction.
• 【Chew-Proof 304 Stainless Steel】 Crafted from high-quality 316 stainless steel, Rat Blocker for Sewers is corrosion-resistant and built to endure harsh drainage environments, including wet, acidic, or foul waste conditions. Trusted by pest professionals.
• 【4”/95-110mm Universal Fit】This Drain Rat Flap is for a 110mm (4 inch) drain size—compatible with standard modern pipework and 100mm Victorian drains. Install at either the inlet or outlet of the drain for full coverage and peace of mind.

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.