Non-Return Valves
Non-return valves help prevent rats from entering buildings through drainage systems. Browse the products below to find drain rat blockers designed to protect pipes and sewer connections.
Rats are capable swimmers and often travel through sewer systems to access buildings through floor drains, waste pipes, and inspection chambers.
Installing a non-return valve inside the drain allows water to flow normally while preventing rats from travelling upstream into the property.
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Mastertrap Drain Rat Blocker Single Flap 4" / 100mm
£69.99Rats use drainage systems to move between properties and access buildings through toilet connections, floor drains, and wastewater pipes. This single-flap valve installs inside 4-inch (100mm) diameter drains to block that route permanently while...£69.99 -
Mastertrap Drain Rat Blocker Single Flap 6" / 150mm
£114.99Larger drainage pipes in commercial properties and main waste lines require proportionally sized protection. This 6-inch (150mm) single-flap valve installs inside commercial-grade drainage systems to block rat access while maintaining full water flow and...£114.99 -
Retrofit Water and Rodent Non-Return Valve 110mm / 4 inch
£99.99Non Return Valves - Retrofit Water & Rodent NRV 110mm/4 inchNon-return valves allow sewer or surface water materials to freely flow in the direction of the systems mains but block backflow of those materials in the opposite direction in instances,...£99.99 -
Retrofit Water and Rodent Non-Return Valve 150mm / 6 inch
£139.99Non Return Valves - Retrofit Water & Rodent NRV 150mm / 6 inchNon-return valves allow sewer or surface water materials to freely flow in the direction of the systems mains but block backflow of those materials in the opposite direction in instances,...£139.99