Insect proof flap valves for pipes and tank outlets
Rain Harvesting's Mozzie Stoppa Flap Valves are mosquito and vermin proof because the 90mm and 100mm valves include a 0.955mm stainless steel screen that is moulded into a valve that can open and shut automatically to allow water to pass unobstructed. They fit directly to pipes leading to the tank and to tank overflow outlets.
(Left) The 50mm Flap Valve incorporates a non-corrosive plastic screen of 0.955mm. (Right) The 90mm (pictured) and 100mm Flap Valves from Rain Harvesting utilise rust proof stainless steel screens of 0.955mm.
Rain Harvesting’s Flap Valves allow a rapid flow of water through a double sealed, self cleaning valve that cannot be over-rotated and left open
100mm Vented Flap Valve
The best kind of Flap Valves have a double seal, are self cleaning, and have flaps that cannot be over-rotated and left open. Vented Flap Valves allow a flow of air over the surface of the water which improves water quality and prevents a vacuum forming when large quantities of water are quickly drawn from the tank.
It is recommended that they be fitted with silicone and not glued. Rain Harvesting has a range of flap valves to suit 50mm, 90mm and 100mm pipe and/or tank overflow outlets.
90mm Vented Flap Valve fitted to a Corrugated Tank Overflow Outlet
(Left) Flap Valve at the end of an inlet pipe to the tank. (Right) Flap Valve fitted to a tank overflow outlet.
Compliance
The Insect Proof Flap Valves complies with Australian Standards:
AS/NZS 4020:2005 Testing of product for use in contact with drinking water
Rain Harvesting's Mozzie Stoppa Flap Valves are mosquito and vermin proof because the 90mm and 100mm valves include a 0.955mm stainless steel screen that is moulded into a valve that can open and shut automatically to allow water to pass unobstructed. They fit directly to pipes leading to the tank and to 
