Patent AU-2016216678-B2 (AU)
Title: Device for improving water quality
Inventor: SPARKE DAVID
IPC: B01D21/00
Filed: 2016-08-18
Granted: 2022-06-09
Abstract: Disclosed herein is a device 10 for improving the quality of rainwater / stormwater by removing 
pollutants therefrom. The device comprises a substantially cylindrical tank 12 having an inlet 14 
for entry of liquid and an outlet 16 for discharge of liquid. A coarse filter 18 is provided in the 
tank 12 for filtering gross pollutants from inflowing liquid, the coarse filter dividing the tank into 
an upstream first region/chamber 20 and a downstream second region/chamber 22. A fine 
pollutant discharge opening 34 is located between the coarse filter 18 and the outlet 16. A valve 
36 comprising a valve member 36a for opening and closing the fine pollutant discharge opening 
34 is configured to automatically open the fine pollutant discharge opening to discharge an initial 
volume of the liquid passing the coarse filter 18, the valve member 36a being biased toward a 
configuration for closure of the opening 34 during an inflow event. The liquid passing through 
opening 34 bypasses the outlet 16.
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