The 90mm Flap Valve will stop mosquitoes from entering your tank outlets without interrupting the flow of fast-moving water.
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.