the Typhoon vortex flow control valve system as supplied by Wavin Limited. It is applicable to surface water applications with design flows from 0.67 l/s to 60 l/s, with a hydrostatic head of up to 2.0 m.
It is not applicable to the PVC up-stand pipe which is not supplied with the Typhoon device.
The system is designed to control the rate of discharge of surface water from attenuation tanks or other storage. It does this by creating a vortex in the outlet once a defined head of water is reached.
Full details can be found in the Assessment Schedule opposite.