Mozzie Stoppa Hi-Flow Flap Valve Screen 3 inch or 4 inch from Rain Harvesting Pty by Blue Mountain Co.

Keep mosquitoes, frogs, and pests out of yourtank inlet, outlet pipes, and your rainwater harvesting system.
The self-closing flap can open fully during highflow events so water flow is not delayed or held back.
Made from UV-stabilised UPVC so you can depend on it to last a while.
Available in 3″ 90mm Female or 4″ 100mm

The self-closing flap can open fully during high flow events so water flow is not delayed or held back.
Made from UV-stabilised UPVC so you can depend on it to last a while.
Improves ventilation & oxygen circulation in your rainwater harvesting tank.