Mastertrap Drain Rat Blocker Single Flap 6" / 150mm

Larger 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 drainage function.

The one-way flap mechanism allows rats already inside the system to exit but prevents re-entry from either direction. Once installed, the valve creates a physical barrier that rats cannot push through or chew past, eliminating the drain as an access point without requiring ongoing maintenance or monitoring. The flap sits in a resting closed position and only opens under water pressure from normal drainage use, then returns to closed immediately after flow stops.

Built from heavy-duty stainless steel to withstand constant water exposure, chemical drainage products, and the corrosive environment inside waste systems. The material won't rust, degrade, or weaken over time, and the solid metal construction resists gnawing attempts from rats trapped on the wrong side of the valve. The unit can be removed if needed for maintenance or system changes.

Suitable for commercial properties, multi-unit residential buildings, and larger main drainage lines where rats are entering through waste systems or where prevention is needed in high-risk areas. Also available in a 4-inch (100mm) diameter for standard domestic drainage pipes.

Key features:
Single-flap one-way valve — allows rats to exit the drainage system but blocks re-entry from either direction, eliminating drains as an access route
Maintains normal drainage function — flap opens under water pressure during use and returns to closed position immediately after flow stops
Heavy-duty stainless steel construction — resists constant water exposure, chemical drain products, and corrosive waste system conditions without rusting or degrading
Long-term protection — provides continuous barrier once installed without ongoing maintenance or monitoring required
Gnaw-resistant solid metal — rats cannot chew through or damage the valve to regain access
Removable if needed — can be taken out for maintenance or system changes

Diameter:
6" / 150mm

Contents:
1 x Drain Rat Blocker Single Flap Valve