Rain Harvesting Flap Valve Vent Screen



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Rain Harvesting Flap Valve Vent Screen

Stop mosquitoes from entering your tank outlets without interrupting the flow of fast-moving water with this “breathable” flap valve.

TAFV01 | 50mm
TAFV02 | 90mm M
TAFV12 | 90mm F
TAFV04 | 100mm
TAFV15 | 150mm

Keep your tank “breathing” safely

Keeping your tank ventilated helps to protect your rainwater quality – but only if you can also keep mosquitoes out. The Flap Valve Vent Screen lets you can do both, safely and effectively. It also prevents a vacuum forming when large quantities of water are quickly drawn from your tank.

Mosquito-proof your tank outlets

Flap Valve Vent Screen protects your rainwater quality. The hinged “flap” or “door” features a mosquito-proof 955 micron stainless steel screen that stops mosquitoes and other pests from getting into your tank via your horizontal outlet pipes. It self-closes to seal off your tank outlets whenever water is not passing through.

Let overflowing water out

The Flap Valve Vent Screen’s responsive hinged flap automatically opens to allow overflowing water to pass out of your tank at a high flow rate.


What are the benefits of a vented flap valve?

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.

What’s the difference between a flap valve and a frog flap?

“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.

Do I need to glue this fitting?

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.



Rain Harvesting


TAFV01 50mm, TAFV02 90mm M, TAFV12 90mm F, TAFV04 100mm, TAFV15 150mm

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