FLAP VALVE (90MM & 100MM)
Vented Flap Valves allow a flow of air over the surface of the water which improves your water quality and prevents vacuuming. The best kind of Flap Valves have a double seal, are self cleaning, and have flaps that cannot be over-rotated and left open.
- Mosquito & vermin proof
- Allows tank water to breathe and stay fresh
- Prevents pests from entering the tank via the overflow
- Automatically opens & shuts
Non Vented Flap Valves also available
When installing it is recommended that the Flap Valve is fitted with silicone and not glued.