Vented and non-vented flap valves provide a self-cleaning insect-proof and vermin-proof barrier at the end of your pipework. However, vented flap valves also allow fresh air to circulate freely through your pipework and tank, a benefit not available with non-vented flap valves.
“Flap valve” and “frog flap” are interchangeable names for the same product. Both are designed to keep frogs and smaller pests such as mosquitoes out of your pipework and tank.
We recommend gluing flap valves to your pipes. Although a flap valve is an end of line component and is not subjected to pressure, it is important that all mosquito-proof barriers are secure.