The Rodent Non-Return Valve (NRV) is a precision-engineered one-way drainage defence system designed to stop rodents entering properties through underground pipework. Built from durable, corrosion-resistant materials and shaped for maximum flow efficiency, this valve allows wastewater to exit freely while preventing rats from travelling upstream into homes and commercial buildings.
Installed within standard 150mm drainage lines, the NRV uses a reinforced stainless-steel flap mechanism that opens only under forward flow and locks shut against backflow or rodent pressure. This simple but highly effective design eliminates common rodent entry routes, helping protect properties from infestations, structural damage, and contamination risks.
Ideal for pest controllers, drainage engineers, housing associations, commercial facilities, and homeowners, the Rodent NRV Valve provides long-term, maintenance-free protection with a secure mechanical barrier that rodents cannot bypass.
Key Features:
One-way stainless-steel flap prevents rodent ingress
High-grade, corrosion-resistant construction
Compatible with standard 100mm drainage systems
Allows unrestricted flow while blocking backflow
Quick installation—no specialist equipment required
Suitable for residential, commercial, and multi-unit properties
Long-term, low-maintenance rodent defence solution
Strong, simple, and reliable this is your first line of defence beneath the ground!