WaReg is a constant flow regulator, which means that as soon as the pressure head has been reached WaReg will release the dimensioned flow. The vortex regulator, however, is set to release the dimensioned flow at a specific height, and will release less than the dimensioned flow in the event of a lower pressure. The WaReg’s constant flow optimises the need for water storage and evacuation of water from a capture base etc.